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13-Valent Pneumococcal Conjugate Vaccine

Phase 3

Healthy Subjects | Monoclonal antibody | Infectious Disease |Pfizer, Inc.|Last Updated: Jul 21, 2026

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials3
Total Enrollment2,000

FDA Designations

No designations recorded

Clinical trial landscape

13-Valent Pneumococcal Conjugate Vaccine · 28 trials · 15 indications

Phase 3 23Phase 2 3Phase 1 2
NCT03571607A Safety And Immunogenicity Study Of A 13-valent Pneumococcal Conjugate Vaccine In Japanese Subjects Aged 6 To 64 Years.Pneumococcal Infections
COMPLETED206 Analytics
NCT0196471613vPnC Multidose Vial Safety, Tolerability and Immunogenicity Study in Healthy Infants.Pneumococcal Vaccines
COMPLETED500 Analytics
NCT01646398A Phase 3 Trial Evaluating the Safety, Tolerability, and Immunogenicity of a 13-valent Pneumococcal Conjugate Vaccine in Japanese Elderly Adults Aged 65 Years Old and OlderPneumococcal Vaccines
COMPLETED764 Analytics
NCT01200368Trial Evaluating a 13-valent Pneumococcal Conjugate Vaccine Given With Diphtheria, Tetanus, and Acellular Pertussis Vaccine (DTaP) in Healthy Japanese InfantsHealthy Subjects
COMPLETED551 Analytics
NCT01026038Study Evaluating Antibody Response Of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) 24 Months After Toddler Dose.13-valent Pneumococcal Vaccine
COMPLETED263 Analytics
NCT00962780Safety and Immunogenicity of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) in HIV-Infected Subjects 6 Years of Age or Older Who Are Naive to Pneumococcal VaccineHIV Infections
COMPLETED303 Analytics
NCT00963235Safety & Immunogenicity of 13vPnC in HIV-Infected Subjects Aged 18 or Older Who Were Previously Immunized With 23vPSHIV Infections
COMPLETED331 Analytics
NCT00853749Immune Response In Children Revaccinated With Pneumococcal Conjugate VaccineInvasive Pneumococcal Disease
COMPLETED89 Analytics
NCT00743652Study Evaluating the Impact of the 13-valent Pneumococcal Conjugate Vaccine (13vPnC) in Alaskan Native Children.Pneumococcal Disease
COMPLETED373 Analytics
NCT00761631Study Evaluating 13-valent Pneumococcal Conjugate Vaccine (13vPnC) in Healthy Children Aged 15 Months to 17 YearsHealthy Subjects
COMPLETED1,200 Analytics
PHASE3COMPLETED
A Safety And Immunogenicity Study Of A 13-valent Pneumococcal Conjugate Vaccine In Japanese Subjects Aged 6 To 64 Years.
Pneumococcal InfectionsUnlock trial analytics
PHASE3COMPLETED
13vPnC Multidose Vial Safety, Tolerability and Immunogenicity Study in Healthy Infants.
Pneumococcal VaccinesUnlock trial analytics
PHASE3COMPLETED
A Phase 3 Trial Evaluating the Safety, Tolerability, and Immunogenicity of a 13-valent Pneumococcal Conjugate Vaccine in Japanese Elderly Adults Aged 65 Years Old and Older
Pneumococcal VaccinesUnlock trial analytics
PHASE3COMPLETED
Trial Evaluating a 13-valent Pneumococcal Conjugate Vaccine Given With Diphtheria, Tetanus, and Acellular Pertussis Vaccine (DTaP) in Healthy Japanese Infants
Healthy SubjectsUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Antibody Response Of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) 24 Months After Toddler Dose.
13-valent Pneumococcal VaccineUnlock trial analytics
PHASE3COMPLETED
Safety and Immunogenicity of 13-Valent Pneumococcal Conjugate Vaccine (13vPnC) in HIV-Infected Subjects 6 Years of Age or Older Who Are Naive to Pneumococcal Vaccine
HIV InfectionsUnlock trial analytics
PHASE3COMPLETED
Safety & Immunogenicity of 13vPnC in HIV-Infected Subjects Aged 18 or Older Who Were Previously Immunized With 23vPS
HIV InfectionsUnlock trial analytics
PHASE3COMPLETED
Immune Response In Children Revaccinated With Pneumococcal Conjugate Vaccine
Invasive Pneumococcal DiseaseUnlock trial analytics
PHASE3COMPLETED
Study Evaluating the Impact of the 13-valent Pneumococcal Conjugate Vaccine (13vPnC) in Alaskan Native Children.
Pneumococcal DiseaseUnlock trial analytics
PHASE3COMPLETED
Study Evaluating 13-valent Pneumococcal Conjugate Vaccine (13vPnC) in Healthy Children Aged 15 Months to 17 Years
Healthy SubjectsUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants Reporting Pre-Specified Local Reactions Within 7 Days After Vaccination in Participants Aged Between 6 to <18 Years
Day 1 up to Day 7

Local reactions were recorded using an electronic daily diary. Local reactions included redness, swelling and pain at injection site. Redness and swelling were graded as mild (0.5 to 2.0 centimeter \[cm\]), moderate (greater than \[\>\] 2.0 to 7.0 cm) and severe (\>7.0 cm) for participants aged 6 to \<12 years, and as mild (2.5 to 5.0 cm), moderate (\>5.0 to 10.0 cm) and, severe (\>10.0 cm) for participants aged 12 to \<18 years. Pain at injection site was graded as mild (did not interfere with activity), moderate (interfered with activity), and severe (prevented daily activity).

Percentage of Participants Reporting Pre-Specified Local Reactions Within 14 Days After Vaccination in Participants Aged Between 18 to <65 Years
Day 1 up to Day 14

Local reactions were recorded using an electronic daily diary. Local reactions included redness, swelling and pain at injection site. Redness and swelling were graded as mild (2.5 to 5.0 cm), moderate (\>5.0 to 10.0 cm) and, severe (\>10.0 cm). Pain at injection site was graded as mild (did not interfere with activity), moderate (interfered with activity), and severe (prevented daily activity).

Percentage of Participants Reporting Systemic Events and Use of Antipyretic or Pain Medication Within 7 Days After Vaccination in Participants Aged Between 6 to <18 Years
Day 1 up to Day 7

Systemic events included fever, vomiting, diarrhea, headache, fatigue, muscle and joint pain, and were recorded by using an e-diary. Use of antipyretic or pain medication was also collected by using an e-diary. Fever was graded as 37.5 to 38.4 degree Celsius (C), 38.5 to 38.9 degree C, 39.0 to 40.0 degree C and \>40.0 degree C. Vomiting was graded as mild (1-2 times in 24 hours), moderate (\>2 times in 24 hours) and severe (required intravenous hydration). Diarrhea was graded as mild (2-3 loose stools in 24 hours), moderate (4-5 loose stools in 24 hours) and severe (greater than or equals to \[\>=\] 6 loose stools in 24 hours). Headache, fatigue, muscle pain and joint pain were graded as mild (no interference with activity), moderate (some interference with activity) and severe (significant, prevented daily activity).

Percentage of Participants Reporting Systemic Events and Use of Antipyretic or Pain Medication Within 14 Days After Vaccination in Participants Aged Between 18 to <65 Years
Day 1 up to Day 14

Systemic events included fever, vomiting, diarrhea, headache, fatigue, muscle and joint pain, and were recorded by using an e-diary. Use of antipyretic or pain medication was also collected by using an e-diary. Fever was graded as 37.5 to 38.4 degree C, 38.5 to 38.9 degree C, 39.0 to 40.0 degree C and \>40.0 degree C. Vomiting was graded as mild (1-2 times in 24 hours), moderate (\>2 times in 24 hours) and severe (required intravenous hydration). Diarrhea was graded as mild (2-3 loose stools in 24 hours), moderate (4-5 loose stools in 24 hours) and severe (\>=6 loose stools in 24 hours). Headache, fatigue, muscle pain and joint pain were graded as mild (no interference with activity), moderate (some interference with activity) and severe (significant, prevented daily activity).

Percentage of Participants Reporting Adverse Events (AEs) and Serious Adverse Events (SAEs)
signing of informed consent form (Day 1) up to Day 43

An AE was any untoward medical occurrence in a participant who received study vaccine without regard to possibility of causal relationship. An SAE is any untoward medical occurrence at any dose that results in death; is life-threatening (immediate risk of death); requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity (substantial disruption of the ability to conduct normal life functions); results in congenital anomaly/birth defect.

Percentage of Participants Achieving a Serotype-Specific Pneumococcal Immunoglobulin G (IgG) Antibody Concentration Greater Than or Equal To (>=) 0.35 Microgram Per Milliliter (mcg/mL) 1 Month After the Infant Series for Each Vaccine Group
1 month after the infant series

Percentage of participants achieving predefined antibody threshold \>=0.35 mcg/mL along with the corresponding 95% confidence interval (CI) for the 13 pneumococcal serotypes (serotypes 1, 3, 4, 5, 6A, 6B, 7F 9V, 14, 18C, 19A, 19F and 23F) are presented. Exact 2-sided confidence interval (Clopper and Pearson) based on the observed proportion of participants. Here "n"= participants with valid and determinate IgG concentration to the given serotype.

Geometric Mean Concentration (GMC) for Serotype-Specific Pneumococcal Immunoglobulin G (IgG) Antibody 1 Month After the Infant Series for Each Vaccine Group
1 month after the infant series

Antibody GMC for the 13 pneumococcal serotypes (serotypes 1, 3, 4, 5, 6A, 6B, 7F 9V, 14, 18C, 19A, 19F and 23F) are presented. GMC (13vPnC) and corresponding 2-sided 95% CI were evaluated. Geometric means (GMs) were calculated using all participants with available data for the specified blood draw. CIs were back transformations of a confidence interval based on the Student t distribution for the mean logarithm of the concentrations. Here "n"= participants with valid and determinate IgG concentration to the given serotype.

Number of Participants Reporting Local Reaction Within 5 Days After Dose 1 in MDV and SDS Group
Within 5 days after Dose 1(Day 2 to Day 6) of the infant series

Local reactions were reported within 5 days (day 2 to day 6) using an electronic diary. Tenderness was scaled as Any (tenderness present); Mild (hurt if gently touched; Moderate (hurt if gently touched with crying); Severe (caused limitation of limb movement). Redness and swelling were scaled as Any (redness or swelling present); Mild (0.5 centimeters \[cm\] to 2.0 cm); Moderate (2.1 to 7.0 cm); Severe (greater than \[\>\] 7.0 cm). Participants may be represented in more than 1 category.

Number of Participants Reporting Local Reaction Within 5 Days After Dose 2 in MDV and SDS Group
Within 5 days after Dose 2 (Day 2 to Day 6) of the infant series

Local reactions were reported within 5 days (day 2 to day 6) using an electronic diary. Tenderness was scaled as Any (tenderness present); Mild (hurt if gently touched; Moderate (hurt if gently touched with crying); Severe (caused limitation of limb movement). Redness and swelling were scaled as Any (redness or swelling present); Mild (0.5 centimeters \[cm\] to 2.0 cm); Moderate (2.1 to 7.0 cm); Severe (greater than \[\>\] 7.0 cm). Participants may be represented in more than 1 category.

Number of Participants Reporting Local Reaction Within 5 Days After Dose 3 in MDV and SDS Group
Within 5 days after Dose 3 (Day 2 to Day 6) of the infant series

Local reactions were reported within 5 days (day 2 to day 6) using an electronic diary. Tenderness was scaled as Any (tenderness present); Mild (hurt if gently touched; Moderate (hurt if gently touched with crying); Severe (caused limitation of limb movement). Redness and swelling were scaled as Any (redness or swelling present); Mild (0.5 centimeters \[cm\] to 2.0 cm); Moderate (2.1 to 7.0 cm); Severe (greater than \[\>\] 7.0 cm). Participants may be represented in more than 1 category.

Number of Participants Reporting Systemic Events Within 5 Days After Dose 1 in MDV and SDS Group
Within 5 days after Dose 1 (Day 2 to Day 6) of infant series

Systemic events (any fever greater than or equal to \[\>=\] 38.0 degrees Celsius \[C\], decreased appetite was scaled as; Moderate (decreased oral intake); Severe (refusal to feed). Irritability scaled as; Mild (easily consolable); Moderate (requiring increased attention); Severe (Inconsolable, crying that cannot be comforted). Increased sleep was scale as; mild (increased or prolonged sleeping bouts); Moderate (slightly subdued interfering with daily activity); Severe (Disabling not interested in usual daily activity) and use of antipyretic medication were reported using an electronic diary. Participants may be represented in more than 1 category.

Number of Participants Reporting Systemic Events Within 5 Days After Dose 2 in MDV and SDS Group
Within 5 days after Dose 2 (Day 2 to Day 6) of infant series

Systemic events (any fever greater than or equal to \[\>=\] 38.0 degrees Celsius \[C\], decreased appetite was scaled as; Moderate (decreased oral intake); Severe (refusal to feed). Irritability scaled as; Mild (easily consolable); Moderate (requiring increased attention); Severe (Inconsolable, crying that cannot be comforted). Increased sleep was scale as; mild (increased or prolonged sleeping bouts); Moderate (slightly subdued interfering with daily activity); Severe (Disabling not interested in usual daily activity) and use of antipyretic medication were reported using an electronic diary. Participants may be represented in more than 1 category.

Number of Participants Reporting Systemic Events Within 5 Days After Dose 3 in MDV and SDS Group
Within 5 days after Dose 3 (Day 2 to Day 6) of infant series

Systemic events (any fever greater than or equal to \[\>=\] 38.0 degrees Celsius \[C\], decreased appetite was scaled as; Moderate (decreased oral intake); Severe (refusal to feed). Irritability scaled as; Mild (easily consolable); Moderate (requiring increased attention); Severe (Inconsolable, crying that cannot be comforted). Increased sleep was scale as; mild (increased or prolonged sleeping bouts); Moderate (slightly subdued interfering with daily activity); Severe (Disabling not interested in usual daily activity) and use of antipyretic medication were reported using an electronic diary. Participants may be represented in more than 1 category.

Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) in the Infant Series
Dose 1 up to 28 to 42 days after dose 3

An AE was any untoward medical occurrence in a participants who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 28 to 42 days after last dose that were absent before treatment or that worsened relative to pretreatment state

Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) Prior to Dose 1
Informed consent up to Dose 1

An AE was any untoward medical occurrence in a participants who received study drug without regard to possibility of causal relationship. An SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Adverse events were also reported in participants who provided consent but were not randomized in this study. The data of these participants has been reported under 'Screened Only' arm.

Serotype-specific Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) for 12 Common Serotypes 1 Month After Vaccination
One month after vaccination

Antibody-mediated serum OPA against each of the 12 pneumococcal serotypes (1, 3, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) was measured centrally using a quantitative functional microcolony OPA (mcOPA) assay. Results were expressed as OPA titers. OPA titers were logarithmically transformed for analysis; geometric means calculated and expressed as geometric mean titers (GMTs).

Percentage of Participants Achieving At Least a 4-fold Rise in OPA Titers for Serotype 6A 1 Month After Vaccination
One month after vaccination

For serotype 6A the percentage of participants achieving at least a 4-fold rise on the serotype-specific antibody titer from pre-vaccination to 1 month post-vaccination was computed along with exact, 2-sided 95% confidence interval for the proportion.

Percentage of Participants Achieving Serotype-specific Pneumococcal Immunoglobulin G (IgG) Antibody Level Greater Than or Equal to (>=) 0.35 Microgram Per Milliliter (mcg/mL) 1 Month After the Infant Series
1 month after the infant series

Percentage of participants achieving predefined antibody threshold \>=0.35 mcg/mL along with the corresponding 95% confidence interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants. To demonstrate non-inferiority, for 6 additional serotypes in 7vPnC + DTaP group, the lowest response observed among the 7 common serotypes in the group was taken as reference.

Geometric Mean Concentration (GMC) of Serotype-specific Pneumococcal Immunoglobulin G (IgG) Antibody for 7 Common Serotypes 1 Month After the Infant Series
1 month after the infant series

Antibody geometric mean concentration (GMC) for 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) are presented. GMC (13vPnC) and corresponding 2-sided 95% confidence intervals (CI) were evaluated. Geometric means (GMs) were calculated using all participants with available data for the specified blood draw.

Percentage of Participants Achieving Predefined Antibody Levels for Diphtheria Toxoid, Tetanus Toxoid, and Pertussis Antigens 1 Month After the Infant Series
1 month after the infant series

Predefined antibody levels were 0.1 International Units/mL (IU/mL) for diphtheria, 0.01 IU/mL for tetanus, 5 Enzyme-linked Immunosorbent Assay (ELISA) units/mL (EU/mL) for pertussis toxoid (PT), and 5 EU/mL for filamentous hemagglutinin (FHA).

Serotype-specific Pneumococcal Immunoglobulin G (IgG) Geometric Mean Concentration (GMC) 1 Month After Single Dose of 13 Valent Pneumococcal Conjugate (13vPnC) Vaccine
One month after vaccination

Antibody GMC as measured by microgram/millilitre (mcg/mL) for 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (Serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. GMC (13vPnC) and corresponding 2-sided 95% confidence intervals (CI) were evaluated. Geometric means (GMs) were calculated using all participants with available data for the specified blood draw.

Percentage of Participants With Prespecified Local Reactions
Seven days after vaccination

Local reactions (redness, swelling and pain) were reported using electronic diary. Redness and swelling were recorded in caliper units (range 1 to 14+), each caliper unit represented 0.5 cm. Categorized as any, absent (no redness or swelling present; 0 caliper units), mild (0.5 to 2.0 cm; 1 to 4 caliper units); moderate (2.5 to 7.0 cm; 5 to 14 caliper units); or severe (\>7.0 cm; \>14 caliper units). Pain was categorized as any, mild: does not interfere with activity; moderate: interferes with activity; severe: prevents daily activity. Participants may be reported in more than 1 category.

Percentage of Participants With Prespecified Systemic Events
Seven days after vaccination

Systemic events (any fever \>= 38 degree celsius \[C\], vomiting, diarrhea, and fatigue) were reported using electronic diary. Fever categorized as \>=38 to \<=39 degree C; \>39 to \<=40 degree C; \>40 degree C. Vomiting: mild (1-2 times/day ); moderate (\>2 times/day); severe (requires intravenous hydration). Diarrhea: mild (2-3 loose stools/day); moderate (4-5 stools/day); severe (\>=6 loose stools/day). Fatigue: mild (does not interfere with activity); moderate (some interference with activity); severe (prevents daily routine activity). Participants may be reported in more than 1 category.

Geometric Mean Fold Rise (GMFR) for Serotype-Specific Pneumococcal Immunoglobulin G (IgG) Antibody From 1 Month After 13vPnC Dose 2 to 1 Month After 13vPnC Dose 3 in All Participants
1 month after 13vPnC Dose 2, 1 month after 13vPnC Dose 3

GMFR for the 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) from 1 month after 13vPnC Dose 2 to 1 month after 13vPnC Dose 3 were computed using the logarithmically transformed assay results. Confidence interval (CI) for GMFR were back transformations of a CI based on the Student t distribution for the mean logarithm of the mean fold rise. GMFRs were calculated using all participants with available data from both 1 month after 13vPnC Dose 2 and after 13vPnC Dose 3 blood draws.

Geometric Mean Fold Rise (GMFR) for Serotype-specific Pneumococcal Immunoglobulin G (IgG) Antibody From 1 Month After Dose 2 of 13vPnC to 1 Month After Dose 3 of 13vPnC
1 month post-dose 2, 1 month post-dose 3

Geometric mean fold rises (GMFRs) for the 13 serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) from 1 month post-dose 2 to 1 month post-dose 3 were computed using the logarithmically transformed assay results. Confidence interval (CI) for the GMFRs were back transformations of a CI based on the Student t distribution for the logarithmically transformed assay results.

Percentage of Participants Achieving a Predefined Serotype-specific Immunoglobulin G (IgG) Antibody Concentration Greater Than or Equal to ( ≥) 0.35 Micrograms Per Milliliter (mcg/mL) Measured 1 Month After Vaccination
Day 28

Percentage of participants achieving predefined antibody threshold ≥ 0.35 mcg/mL along with the corresponding 95 percent (%) Confidence Interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants.

Percentage of Participants Achieving Opsonophagocytic Assay (OPA) Titers ≥ 1:8 Measured 1 Month After Vaccination
Day 28

Percentage of participants achieving OPA along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants.

Percentage of Participants Achieving Serotype-Specific Pneumococcal Immunoglobulin G (IgG) Antibody Level ≥0.35 Micrograms Per Milliliter (Mcg/mL) 1 Month After the Infant Series
28 to 56 days after vaccination 3 for Group 1, after vaccination 2 for Group 2, and after vaccination 1 for Group 3.

Percentage of participants in 13vPnC Groups 1, 2 and 3 achieving predefined antibody threshold ≥0.35 mcg/mL along with the corresponding 95% confidence interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based upon the observed proportion of participants.

Percentage of Participants Achieving Serotype-Specific Pneumococcal IgG Antibody Level ≥0.35 Mcg/mL 1 Month After the Toddler Dose
28 to 56 days after vaccination 4 for Group 1, after vaccination 3 for Group 2, and after vaccination 2 for Group 3.

Percentage of participants in 13vPnC Groups 1, 2, and 3 achieving predefined antibody threshold ≥0.35 mcg/mL along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based upon the observed proportion of participants.

Percentage of Participants Achieving Serotype-specific Pneumococcal IgG Antibody Level ≥0.35 Mcg/mL 1 Month After the Relevant Catch-Up Dose
28 to 56 days after vaccination 2 for Group 4, and after the single vaccination in Group 5.

Percentage of participants in 13vPnC Groups 4 and 5 achieving predefined antibody threshold ≥0.35 mcg/mL along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based upon the observed proportion of participants.

Percentage of Participants Achieving Predefined Serotype-specific Immunoglobulin G (IgG) Antibody Concentration Greater Than or Equal to (≥) 0.35 Micrograms Per Milliliter (mcg/mL) Measured 1 Month After Vaccination in Group 1 and 2
28 to 42 days after dose 2 for Group 1 and 28 to 42 days after dose 1 for Group 2

Percentage of participants achieving world health organization (WHO) predefined antibody threshold \>=0.35 mcg/mL along with the corresponding 95% confidence interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) were presented. Exact 2-sided CI based on observed proportion of participants.

Geometric Mean Concentration (GMC) for Serotype-specific Pneumococcal Immunoglobulin G (IgG) Antibody Measured 1 Month After Vaccination in Group 3
28 to 42 days after dose 1 for Group 3

Antibody GMC for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) were presented. GMC (13vPnC) and corresponding 2-sided 95% confidence intervals (CI) were evaluated. Geometric means (GMs) were calculated using all participants with available data for after dose 1 blood draw.

Serotype-specific Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) 1 Month After Vaccination in Group 3 and 4
28 to 42 days after dose 1 for Group 3 and 4

Serotype-specific OPA GMTs for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) were determined in the blood samples of all the participants using a microcolony OPA (mcOPA) assay. GMT (13vPnC) and corresponding 2-sided 95% CI were evaluated. GMs were calculated using all participants with available data for after dose 1 blood draw.

Percentage of Participants Achieving a Predefined Antibody Level of Greater Than or Equal to 0.35 Micrograms (mcg)/mL, 1 Month After the Infant Series.
1 month after the infant series (7 months of age)

Percentage of participants achieving a predefined antibody level of greater than or equal to 0.35 mcg/mL along with the corresponding exact 95% confidence interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Percentage of Participants With Pre-specified Local Reactions
Days 1 through 14

Local reactions were collected by the participant using an electronic diary. Redness and swelling scaled as any(present); mild(2.5-5.0 centimeters\[cm\]); moderate(5.1-10.0 cm); severe(\>10.0cm). Pain as any(present); mild(present, no interference with activity); moderate(present, some interference with activity); severe(present, prevents daily activity). Limitation of arm movement as any(present); mild(present, could move arm above head); moderate(could move arm above shoulder but not above head); severe(could not move arm above shoulder). Participants may be represented in more than 1 category.

Percentage of Participants With Pre-specified Systemic Events
Days 1 through 14

Systemic events were collected by participant using electronic diary. Fatigue,headache,new/aggravated generalized muscle pain,new/aggravated generalized joint pain: any, mild(no interference with activity), moderate(some interference with activity), severe(prevents routine daily activity). Fever(\>=38 degrees Celsius\[C\]), chills, rash, vomiting(mild:1-2 times daily; moderate:\>2 times daily; severe:prevents daily activity) decreased appetite \& diarrhea(mild:2-3 loose stools/day; moderate:4-5 loose stools/day; severe:\>=6 loose stools/day) reported. Participants may be represented in \>1 category.

Percentage of Participants Taking Pain or Antipyretic Medication
Days 1 through 14

Use of pain or antipyretic medication was collected by the participants using an electronic diary.

Percentage of Participants Achieving Serotype Specific IgG Antibody Concentration ≥0.35 Micrograms Per Milliliter (Mcg/mL) in the 13vPnC Group Relative to 7vPnC Group 1 Month After the Infant Series
1 Month after the infant series (7 Months of age)

Percentage of participants achieving predefined antibody threshold ≥0.35 mcg/mL along with the corresponding 95% confidence interval (CI) for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Percentage of Participants Achieving Antibody Level ≥5 Enzyme-linked Immunosorbent Assay (ELISA) Units Per mL (EU/mL) for Pertussis in the 13vPnC Group Relative to 7vPnC Group 1 Month After the Infant Series
1 month after the infant series (7 months of age)

Percentage of participants achieving predefined antibody threshold ≥5 enzyme-linked immunosorbent assay (ELISA) units per mL (EU/mL) along with the corresponding 95% CI for concomitant antigen pertussis (pertussis toxoid \[PT\], filamentous hemagglutinin \[FHA\], and pertactin \[PRN\]) are presented.

Percentage of Participants With a New Acquisition of Serotype 6A' (6A + 6C) or 19A Combined 1 Month After the Infant Series to 24 Months of Age
Month 7 through Month 24

A new acquisition was defined as the detection of a serotype (here 6A' \[6A + 6C\] or 19A), once a participant was fully vaccinated (one month after dose 3), that had not been detected previously in the baseline samples at 2, 4, 6 months of age.

Pneumococcal OPA Geometric Mean Titers (GMTs) for the 12 Common Serotypes for 13vPnC / 23vPS (Year 1) Versus 23vPS (Year 0)
1 month after vaccination 1 (Vax 1=Day 1/ Year 0 [Visit 1]) and 1 month after vaccination 2 (Vax 2=Day 351 up to Day 379 after Visit 1)

Antibody geometric mean titers as measured by opsonophagocytic assays (OPA) for 12 common pneumococcal serotypes (serotypes 1, 3, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F). Confidence intervals (CI) for the GMTs are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Pneumococcal OPA Geometric Mean Titers (GMTs) for the 12 Common Serotypes for 13vPnC / 23vPS Versus 23vPS / 13vPnC (Year 1)
1 month after vaccination 2 (Vax 2=Day 351 up to Day 379 after Visit 1)

Antibody geometric mean titers as measured by opsonophagocytic assays (OPA) for 12 common pneumococcal serotypes (serotypes 1, 3, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F). Confidence intervals (CI) for the GMTs are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Pneumococcal OPA Geometric Mean Titers (GMTs) for the 12 Common Serotypes for 13vPnC Relative to 23vPS (Vax 1 / Year 0)
1 month after Vax 1 / Year 0

Antibody geometric mean titers as measured by opsonophagocytic activity (OPA) assays for the 12 common serotypes (serotypes 1, 3, 4, 5, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F). Confidence intervals (CI) for the GMTs are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Percentage of Participants Achieving a ≥ 4-fold Rise for Serotype 6A OPA Titer for 13vPnC Relative to 23vPS (Vax 1 / Year 0)
Baseline, 1 month after Vax 1 / Year 0

OPA titer for the 6A serotype measured for at least a 4-fold increase from the prevaccination to postvaccination blood sample collection. Exact 2-sided CI (Clopper and Pearson) based upon the observed percentage of participants.

Pneumococcal OPA Geometric Mean Titers (GMTs) for the 13 Serotypes 1 Month After 13vPnC / 23vPS / 13vPnC (Vaccination 3) Versus 1 Month After 13vPnC (Vaccination 1)
Month 1 / Year 0 (Core study/NCT00269672), Month 1 / Year 2 (Follow-up study/NCT00500357)

Antibody geometric mean titers as measured by opsonophagocytic activity (OPA) assay for 13 pneumococcal serotypes (serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F). Confidence intervals (CI) for the GMTs are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

TIV Comparisons: Percentage of Participants Achieving at Least a 4-fold Increase in the Titer of the Standard Hemagglutination Inhibition Assay (HAI)
Baseline and 1 month after TIV vaccination

Percentage of participants achieving at least a 4-fold increase in the titer of the standard HAI for each influenza virus subtype (A/H1N1, A/H3N2, and B) were compared.

13vPnC Comparisons: Serotype-specific Pneumococcal Immunoglobulin G (IgG) Geometric Mean Concentration (GMC)
1 month after 13vPnC vaccination

IgG GMC as measured by enzyme-linked immunosorbent assay (ELISA) and expressed in micrograms per mL (mcg/mL) for serotypes 1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F.

Percentage of Participants Achieving Antibody Level ≥0.35μg/mL After Vaccination
28 to 42 days after vaccination 3 for Group 1 (13 to <17 months of age), after vaccination 2 for Group 2 (14 to <26 months of age), and after vaccination 1 for Group 3 (26 to <73 months of age).

Percentages of participants achieving World Health Organization (WHO) predefined antibody threshold ≥0.35μg/mL along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Geometric Mean Antibody Concentration (GMC) After Vaccination in 13vPnC Groups
28 to 42 days after vaccination 3 for Group 1 (13 to <17 months of age), after vaccination 2 for Group 2 (14 to <26 months of age), and after vaccination 1 for Group 3 (26 to <73 months of age).

GMC as measured by enzyme-linked immunosorbent assay (ELISA) for 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (Serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Percentage of Subjects Achieving Predefined Antibody Level ≥1:8 for Meningococcal C Serum Bactericidal Assay (SBA) in the 13vPnC Group Relative to 7vPnC Group After 2 Doses of NeisVac-C® in the Infant Series
1 month after 2 doses of NeisVac-C® in the infant series (7 months of age)

Percentage of subjects achieving predefined antibody threshold ≥1:8 along with the corresponding 95 percent (%) confidence interval (CI) for concomitant antigen meningococcal C SBA are presented. Non-inferiority was declared if the lower limit of the 2-sided 95% CI for the difference between the 2 treatment groups \> -10%.

Geometric Mean Titer (GMT) of Meningococcal C Antigen in the 13vPnC Group Relative to 7vPnC Group After 2 Doses of NeisVac-C® in the Infant Series
1 month after 2 doses of NeisVac-C® in the infant series (7 months of age)

Antibody geometric mean titer of meningococcal C antigen are presented. GMT and corresponding 2-sided 95% CI were constructed by back transformation of the CI for the mean of the logarithmically transformed assay results computed using the Student t distribution. In addition, the 2-sided 95% confidence interval on the ratio of the geometric means for 13vPnC relative to 7vPnC was constructed by back transformation of the Student t distribution for the mean difference of the measures on the logarithmic scale.

Percentage of Subjects Achieving Predefined Antibody Level to Pertussis Antigens in the 13vPnC Group Relative to 7vPnC Group After the 3-dose Infant Series
1 month after the 3-dose infant series (7 months of age)

Percentage of subjects achieving predefined antibody threshold ≥5 enzyme-linked immunosorbent assay (ELISA) units per mL (EU/mL) along with the corresponding 95 % CI for concomitant antigens pertussis (pertussis toxoid \[PT\], filamentous hemagglutinin \[FHA\], and pertactin \[PRN\]) and ≥ 2.2 EU/mL fimbrial agglutinogens (FIM) are presented. Non-inferiority was declared if the lower limit of the 2-sided 95% CI for the difference between the 2 treatment groups \> -10%.

Geometric Mean Concentration (GMC) of Pertussis Antigens in the 13vPnC Group Relative to 7vPnC Group After the 3-dose Infant Series
1 month after the 3-dose Infant Series (7 months of age)

Antibody geometric mean concentration of pertussis antigens (PT, FHA, PRN, and FIM) as measured by EU/mL are presented. GMC and corresponding 2-sided 95% CI were constructed by back transformation of the CI for the mean of the logarithmically transformed assay results computed using the Student t distribution. In addition, the 2-sided 95% confidence intervals on the ratio of the GMCs for 13vPnC relative to 7vPnC were constructed by back transformation of the Student t distribution for the mean difference of the measures on the logarithmic scale.

Percentage of Subjects Achieving Predefined Antibody Level ≥0.15 Micrograms Per mL (μg/mL) for Polyribosylribitol Phosphate (PRP) in Hib in the 13vPnC Group Relative to 7vPnC Group After the 3-dose Infant Series
1 month after the 3-dose infant series (7 months of age)

Percentage of subjects achieving predefined antibody threshold ≥0.15 μg/mL along with the corresponding 95 percent (%) confidence interval (CI) for concomitant antigen PRP in Hib are presented. Non-inferiority was declared if the lower limit of the 2-sided 95% CI for the difference between the 2 treatment groups \> -10%.

Geometric Mean Concentration (GMC) of PRP in Hib in the 13vPnC Group Relative to 7vPnC Group After the 3-dose Infant Series
1 month after the 3-dose infant series (7 months of age)

Antibody geometric mean concentration of PRP in Hib as measured by µg/mL are presented. GMC and corresponding 2-sided 95% CI were constructed by back transformation of the CI for the mean of the logarithmically transformed assay results computed using the Student t distribution. In addition, the 2-sided 95% confidence interval on the ratio of the GMCs for 13vPnC relative to 7vPnC was constructed by back transformation of the Student t distribution for the mean difference of the measures on the logarithmic scale.

Percentage of Participants Achieving Antibody Level ≥0.35μg/mL in 13vPnC Manufacturing Scale Group Relative to 13vPnC Pilot Scale Group After the 3-Dose Infant Series
One month after 3-dose infant series (5 months of age)

Percentages of participants achieving WHO predefined antibody threshold ≥0.35μg/mL along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Percentage of Participants Reporting Pre-Specified Local Reactions
During the 4-day period after each dose

Local reactions were reported using an electronic diary. Tenderness was scaled as Any (tenderness present); Significant(Sig) (present and interfered with limb movement). Induration and erythema were scaled as Any (induration or erythema present); Mild (0.5 centimeters \[cm\] to 2.0 cm); Moderate (Mod) (2.5 to 7.0 cm); Severe (\> 7.0 cm). Participants may be represented in more than 1 category.

Percentage of Participants Reporting Pre-Specified Systemic Events (Infant Series)
During the 4-day period after each dose

Systemic events (fever ≥ 38 degrees Celsius \[C\] but ≤ 39 C, fever \>39 C but ≤ 40 C, fever \> 40 C, decreased appetite, irritability, increased sleep, decreased sleep, use of medication (Meds)to prevent symptoms (sx), and use of medication to treat symptoms) were collected using an electronic diary. Participants may be represented in more than 1 category.

Percentage of Participants Reporting Pre-Specified Systemic Events (Toddler Series)
During the 4-day period after toddler dose

Systemic events (fever ≥ 38 degrees Celsius \[C\] but ≤ 39 C, fever \>39 C but ≤ 40 C, fever \> 40 C), decreased appetite, irritability, increased sleep, decreased sleep, use of medication to prevent symptoms, and use of medication to treat symptoms) were collected using an electronic diary. Participants may be represented in more than 1 category.

Geometric Mean Antibody Concentration in 13vPnC Manufacturing Scale Group Relative to 13vPnC Pilot Scale Group After the 3-Dose Infant Series
One month after 3-dose infant series (5 months of age)

Antibody concentration/geometric mean concentration (GMC) as measured by enzyme-linked immunosorbent assay (ELISA) for 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (Serotypes 1, 3, 5, 6A, 7F, and 19A) are presented.

Percentage of Participants Achieving a Predefined Antibody Level for Concomitant Vaccine Pertussis Antigens (Pertussis Toxoid [PT], Filamentous Hemagglutinin [FHA], Pertactin [PRN]), 1 Month After the Infant Series.
1 month after the infant series (18 weeks of age)

Percentage of participants achieving a predefined antibody level (measured in enzyme-linked immunosorbent assay \[ELISA\] units per mL \[EU/mL\]) along with the corresponding O'Brien-Fleming-adjusted, exact, 2-sided 95% CI for concomitant antigens pertussis (PT, FHA and PRN) are presented.

Serotype-specific Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) 1 Month After Vaccination 1
One month after vaccination 1

Serotype-specific OPA GMTs for the 13 pneumococcal common serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) were determined in the blood samples of all the participants using microcolony OPA (mcOPA) assay. CIs for GMT are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Percentage of Participants Achieving At Least a 4-fold Rise in OPA Titer for Serotype 6A 1 Month After Vaccination 1 in Cohort 1
One month after vaccination 1

For serotype 6A the percentage of participants achieving at least a 4-fold rise on the serotype-specific antibody titer from pre-vaccination to 1 month post-vaccination was computed along with exact, 2-sided 95% confidence interval for the proportion.

Serotype-specific Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) 1 Month After Vaccination for 12 Common Serotypes in 13vPnC/23vPS Group Relative to 23vPS Group and 23vPS/23vPS Group
One month after vaccination 1 and One month after vaccination 2/Year 3 to 4

Serotype-specific OPA GMTs for the 12 pneumococcal common serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) were determined in the blood samples of all the participants using mcOPA assay. CIs for GMT are back transformations of a CI based on the Student t distribution for the mean logarithm of the titers.

Percentage of Participants Achieving a Pneumococcal IgG Antibody Concentration ≥0.35 Mcg/mL for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 5)
Day 28 (Visit 5)

Percentage of participants achieving predefined IgG antibody threshold ≥0.35 micrograms per milliliter (Mcg/mL) for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% confidence intervals (CIs) based on the observed percentage of participants.

Percentage of Participants Achieving a Pneumococcal IgG Antibody Concentration ≥0.35 Mcg/mL for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 4)
Day 7 (Visit 4)

Percentage of participants achieving predefined IgG antibody threshold ≥0.35 Mcg/mL for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% CIs based on the observed percentage of participants.

Percentage of Participants Achieving a Pneumococcal Opsonophagocytic Activity (OPA) Antibody Titer ≥LLOQ for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 5)
Day 28 (Visit 5)

Percentage of participants achieving predefined OPA antibody titer ≥ serotype-specific lower limit of quantification (LLOQ) using modified microcolony assays for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% CIs based on the observed percentage of participants. LLOQ for each serotype: 1=1:8, 3=1:12, 4=1:21, 5=1:29, 6A=1:37, 6B=1:43, 7F=1:210, 9V=1:345, 14=1:35, 18C=1:31, 19A=1:18, 19F=1:48, 23F=1:13.

Percentage of Participants Achieving a Pneumococcal Opsonophagocytic Activity (OPA) Antibody Titer ≥LLOQ for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 4)
Day 7 (Visit 4)

Percentage of participants achieving predefined OPA antibody titer ≥ serotype-specific lower limit of quantification (LLOQ) using modified microcolony assays for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% CIs based on the observed percentage of participants. LLOQ for each serotype: 1=1:8, 3=1:12, 4=1:21, 5=1:29, 6A=1:37, 6B=1:43, 7F=1:210, 9V=1:345, 14=1:35, 18C=1:31, 19A=1:18, 19F=1:48, 23F=1:13.

Percentage of Participants Achieving a Pneumococcal Opsonophagocytic Activity (OPA) Antibody Titer ≥1:8 for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 5)
Day 28 (Visit 5)

Percentage of participants achieving predefined OPA antibody titer ≥1:8 for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% CIs based on the observed percentage of participants. The lowest titer that can be determined using the standard OPA assay is a titer of 1:8 limit of detection (LOD) and is the same for each serotype-specific OPA assay.

Percentage of Participants Achieving a Pneumococcal Opsonophagocytic Activity (OPA) Antibody Titer ≥1:8 for the 13 Serotypes for 7vPnC / 13vPnC in Comparison to MnCC / 13vPnC After Vaccination (Visit 4)
Day 7 (Visit 4)

Percentage of participants achieving predefined OPA antibody titer ≥1:8 for the 13 pneumococcal serotypes (7vPnC serotypes 4, 6B, 9V, 14, 18C, 19F, 23F and additional serotypes 1, 3, 5, 6A, 7F, and 19A) along with the exact, 2-sided 95% CIs based on the observed percentage of participants. The lowest titer that can be determined using the standard OPA assay is a titer of 1:8 limit of detection (LOD) and is the same for each serotype-specific OPA assay.

Percentage of Participants Achieving a Serotype-specific Immunoglobulin G (IgG) Antibody Level Greater Than or Equal to (≥) 0.35 Micrograms Per Milliliter (Mcg/mL) Measured 1 Month After the Infant Series
1 month after the infant series (7 months of age)

Percentage of participants achieving predefined antibody threshold ≥0.35 Mcg/mL along with the corresponding 95 percent (%) confidence interval (CI) was calculated for 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A).

Demonstrate 13vPnC without AlPO4 is as immunogenic as 13vPnC with AlPO4 to select a 13vPnC formulation.
Number of participants reporting Adverse Events
Baseline to Month 1
Percentage of Participants Reporting Pre-Specified Systemic Events
Within 15 days after each dose

Systemic events (fever \[Fv\] ≥ 38 degrees Celsius \[C\] but ≤ 39 C, fever \>39 C but ≤ 40 C, fever \> 40 C, decreased (decr.) appetite, irritability, increased sleep, decreased sleep, use of medication (Med.)to prevent symptoms (sx), and use of medication to treat symptoms) were reported using a paper worksheet. Participants may be represented in more than 1 category.

Percentage of Participants Achieving Antibody Level ≥0.35μg/mL in 13vPnC Group Relative to 7vPnC Group After the 3-Dose Infant Series
one month after 3-dose infant series (at 7 months of age)

Percentage of participants achieving World Health Organization (WHO) predefined antibody threshold ≥0.35μg/mL along with the corresponding 95% CI for the 7 common pneumococcal serotypes (serotypes 4, 6B, 9V, 14, 18C, 19F, and 23F) and 6 additional pneumococcal serotypes specific to 13vPnC (serotypes 1, 3, 5, 6A, 7F, and 19A) are presented. Exact 2-sided CI based on the observed proportion of participants.

Secondary Endpoints

Serotype-specific Opsonophagocytic Activity (OPA) Geometric Mean Titers (GMTs) at Pre-vaccination and 1 Month After Vaccination
Pre-vaccination and 1 month after vaccination
Geometric Mean Fold Rises (GMFRs) in Serotype-specific OPA Titers 1 Month After Vaccination
Pre-vaccination to 1 month after vaccination
Serotype-specific Immunoglobulin G (IgG) Geometric Mean Concentrations (GMCs) at Pre-vaccination and 1 Month After Vaccination
Pre-vaccination and 1 month after vaccination
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposePREVENTION

Treatment Arms

ArmTypeDescription
13-valent pneumococcal conjugate vaccineEXPERIMENTAL -
Multidose Vial GroupEXPERIMENTALSubjects will receive three doses of 13-valent pneumococcal conjugate vaccine in the multidose vial formulation. Each dose is 0.5 mL
Single-Dose Syringe GroupACTIVE_COMPARATORSubjects will receive three doses of 13-valent pneumococcal conjugate vaccine in the single-dose syringe formulation. Each dose is 0.5 mL
>= 65-year age group-13vPnCEXPERIMENTAL -
>= 65-year age group-23vPSACTIVE_COMPARATOR -
1EXPERIMENTALExperimental
2ACTIVE_COMPARATORActive comparator
3ACTIVE_COMPARATORActive comparator
SingleOTHERAll subjects will receive a single dose of 13vPnC
Group1EXPERIMENTALSubjects 6 weeks to \<10 months of age with 0 prior dose of Prevnar.
Group 2EXPERIMENTALSubjects \<12 months of age with 1 prior dose of Prevnar.
Group 3EXPERIMENTALSubjects \<12 months of age with 2 prior doses of Prevnar.
Group 4EXPERIMENTALSubjects ≥12 months to \<2 years of age.
Group 5EXPERIMENTALSubjects ≥2 years to \<5 years of age
13vPnCEXPERIMENTAL13-valent pneumococcal conjugate vaccine (13vPnC) 0.5 milliliter (mL) dose administered intramuscularly (IM) at 2, 4, and 6 months of age (infant series) and 12 months of age (toddler dose).
7vPnCACTIVE_COMPARATOR7-valent pneumococcal conjugate vaccine (7vPnC) 0.5 mL dose administered IM at 2, 4, and 6 months of age (infant series) and 12 months of age (toddler dose).
Group 1.1EXPERIMENTALGroup 1.1 = 13vPnC then 13vPnC
Group 1.2EXPERIMENTALGroup 1.2 = 13vPnC then 23vPS
13vPnC+TIV Followed by Placebo 1 month laterEXPERIMENTAL -
Placebo+TIV Followed by 13vPnC 1 month laterACTIVE_COMPARATOR -
AEXPERIMENTAL -
BACTIVE_COMPARATOR -
13vPnC Cohort 1, Vaccination 1EXPERIMENTALParticipants aged 60-64 years were given a 0.5 mL dose administered on day 1.
23vPS Cohort 1, Vaccination 1ACTIVE_COMPARATORParticipants aged 60-64 years were given a 0.5 mL dose administered on day 1.
13vPnC Cohort 2, Vaccination 1EXPERIMENTALParticipants aged 50-59 years given a 0.5 mL dose administered on day 1.
13vPnC Cohort 3, Vaccination 1EXPERIMENTALParticipants aged 18-49 years given a 0.5 mL dose administered on day 1.
13vPnC Cohort 1, Vaccination 2EXPERIMENTALParticipants aged 60-64 years who received 13vPnC at vaccination 1 receive a 0.5 mL dose of 13vPnC administered 3-4 years after dose 1.
23vPS Cohort 1, Vaccination 2ACTIVE_COMPARATORParticipants aged 60-64 years who received 23vPS at vaccination 1 receive a 0.5 mL dose of 23vPS administered 3-4 years after dose 1.
13vPnC Cohort 2, Vaccination 2EXPERIMENTALParticipants aged 50-59 years who received 13vPnC at vaccination 1 receive a 0.5 mL dose of 13vPnC administered 3-4 years after dose 1.
Group 1EXPERIMENTALAdults aged 18 through 55 years (before the fifty sixth birthday)

Interventions

NameTypeDescription
13-valent pneumococcal conjugate vaccineBIOLOGICALA single dose (0.5 mL) will be administered intramuscularly into the deltoid muscle at visit 1.
23-valent pneumococcal polysaccharide vaccineBIOLOGICALA single dose (0.5 mL) will be administered intramuscularly into the deltoid muscle at visit 1.
13-valent pneumococcal conjugate vaccine (13vPnC)BIOLOGICAL0.5 mL per dose, 4 doses
diphtheria, tetanus, and acellular pertussis vaccine (DTaP)BIOLOGICAL0.5 mL per dose, 4 doses
7-valent pneumococcal conjugate vaccine (7vPnC)BIOLOGICAL0.5 mL per dose, 4 doses
DTaPBIOLOGICAL0.5 mL per dose, 4 doses
23-valent Pneumococcal Polysaccharide Vaccine (23vPS)BIOLOGICAL23vPS; 1 vaccination given at visit 4 (approximately 1 month after visit 3)
Blood drawPROCEDUREBlood draw; 5 blood draws approximately 1 month apart taken prior to vaccination at visits 1-4 and visit 5 (approximately 1 month after visit 4).
13 valent pneumococcal conjugate vaccineBIOLOGICALIntramuscular injection of 0.5mL at visit 1 and visit 2 for group 1 and and visit 1 for groups 2, 3, and 4.
7 valent pneumococcal conjugate vaccineBIOLOGICAL1 dose at 2, 4, 6 and 12 months of age
23vPSBIOLOGICAL0.5-mL dose 23vPS will be administered into the deltoid muscle at year 0 and 0.5-mL dose 13vPnC will be administered into the deltoid muscle at year 1
13vPnC + TIVBIOLOGICALSingle 0.5 mL 13vPnC placebo vaccine and a single 0.5 mL TIV, administered IM, followed by a single 0.5 mL 13vPnC vaccine, 1 month later.
7-valent pneumococcal conjugate vaccineBIOLOGICAL7-valent pneumococcal conjugate vaccine administered at 2-, 4-, 6-, and 12 months of age.
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Eligibility Criteria

Age Range6 Years to 64 Years
SexALL
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: * Japanese males and females aged 6 to \<65 years at enrollment. * Subjects with an increased risk of pneumococcal disease determined by documented medical history, physical examination, and clinical judgment of the investigator. Exclusion Criteria: * Previous vaccination with...

Countries:JapanThe GambiaFranceRomaniaSouth AfricaUnited StatesIcelandTaiwanGermanySwedenBrazilIsraelPolandCanadaIndiaSouth KoreaChina
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Recent Changes (Last 90 Days)

MEDIUMAug 21, 2026NCT00761631TRIAL_REMOVED: changed
MEDIUMAug 21, 2026NCT00761631TRIAL_REMOVED: changed
MEDIUMAug 21, 2026NCT00761631TRIAL_REMOVED: changed

Frequently asked questions about 13-Valent Pneumococcal Conjugate Vaccine

What is the 13-valent pneumococcal conjugate vaccine used for?

The 13-valent pneumococcal conjugate vaccine is used to prevent pneumococcal infections, including invasive pneumococcal disease. It is being studied in adults, infants, children, and Japanese subjects aged 6 to 64 years. The vaccine is developed by Pfizer, Inc. (PFE) and is currently in Phase 3 clinical development.

Who makes the 13-valent pneumococcal conjugate vaccine?

Pfizer, Inc. (PFE) develops the 13-valent pneumococcal conjugate vaccine. The company is conducting clinical trials of the vaccine across multiple countries, including the United States, South Korea, Iceland, and Japan.

What phase is the 13-valent pneumococcal conjugate vaccine in?

The 13-valent pneumococcal conjugate vaccine is in Phase 3 clinical development. It has completed nine trials with a total enrollment of 8,452 participants. The vaccine is investigational and not yet approved for use.

What clinical trials is the 13-valent pneumococcal conjugate vaccine in?

The 13-valent pneumococcal conjugate vaccine has completed several trials, including NCT00427895 comparing it with a 23-valent pneumococcal polysaccharide vaccine in adults, NCT00689351 in Korean infants, NCT00853749 in children revaccinated in Iceland, and NCT03571607 in Japanese subjects aged 6 to 64 years.

Is the 13-valent pneumococcal conjugate vaccine the same as Prevnar 13?

The 13-valent pneumococcal conjugate vaccine is developed by Pfizer, Inc. and is commonly known as Prevnar 13. It is designed to protect against 13 serotypes of Streptococcus pneumoniae bacteria.