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A/turkey H5N1 vaccine

Phase 2

Influenza | Monoclonal antibody | Infectious Disease |GSK plc|Last Updated: Jul 9, 2018

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment841

FDA Designations

No designations recorded

Clinical trial landscape

A/turkey H5N1 vaccine · 1 trial · 1 indication

Phase 2 1
NCT00719043Immunogenicity & Safety of GSK's Avian Flu Vaccine 1557484A Given to Adults Aged ≥18 YearsInfluenza
COMPLETED841 Analytics
PHASE2COMPLETED
Immunogenicity & Safety of GSK's Avian Flu Vaccine 1557484A Given to Adults Aged ≥18 Years
InfluenzaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.
At Day 559

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (\<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 549. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups.

Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain.
At Days 549 and 559

HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups.

Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.
At Days 549 and 559

A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups.

Number of Subjects With Solicited Local Symptoms
Within the 7-day (Days 0-6) post vaccination periods

Assessed solicited local symptoms were pain, redness and swelling. Any was defined as an occurrence of the specified solicited local symptom regardless of its intensity.

Number of Subjects With Solicited General Symptoms
Within the 7-day (Days 0-6) post vaccination periods

Solicited general symptoms assessed were fatigue, headache, joint pain at other locations (joint pain), muscle aches, shivering, sweating and fever. Any was defined as an occurrence of the specified solicited general symptom, irrespective of its intensity or relationship to vaccination. Any fever was defined as oral temperature higher than or equal to (≥) 38.0 degrees Celsius (°C).

Number of Subjects With Medically-attended Adverse Events (MAEs)
From Day 0 to Day 909

MAEs were defined as adverse events with medically-attended visits that were not routine visits for physical examination or vaccination, such as visits for hospitalization, an emergency room visit, or an otherwise unscheduled visit to or from medical personnel (medical doctor) for any reason. Any was defined as any occurrence of MAE(s).

Number of Subjects With Unsolicited Adverse Events (AEs)
Within the 43-day (Days 0-42) post-vaccination periods

An unsolicited AE was defined as an untoward medical occurrence in a patient or clinical investigation subject, temporally associated with use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as any occurrence of an unsolicited AE in a subject, regardless of intensity grade or relation to vaccination.

Number of Subjects With Serious Adverse Events (SAEs)
From Day 0 to Day 909

A SAE was defined as any untoward medical occurrence that: resulted in death, was life threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or was a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as an occurrence of an SAE, regardless its relationship to vaccination.

Secondary Endpoints

Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.
At Day 192
Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey Virus Strain.
At Days 182 and 192
Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain.
At Days 182 and 192
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
A/Indonesia primed-A/turkey Influenza (H5N1)-F1-Placebo GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 1 at Day 0 followed by one booster dose of A/turkey H5N1 vaccine formulation 1 at Day 182 and one dose of placebo (phosphate buffered saline, PBS) at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and Placebo vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, A/turkey H5N1 vaccine was administered intramuscularly in the deltoid region of the dominant arm.
A/Indonesia primed-A/turkey Influenza (H5N1)-F2-Placebo GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 2 at Day 0 followed by one booster dose of A/turkey H5N1 vaccine formulation 2 at Day 182 and one dose of placebo (phosphate buffered saline, PBS) at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and Placebo vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, A/turkey H5N1 vaccine was administered intramuscularly in the deltoid region of the dominant arm.
A/Indonesia primed-A/turkey Influenza (H5N1)-F3-Placebo GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 3 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 3 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm.
A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F1-GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) vaccine formulation 1 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 1 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm.
A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F4-GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 4 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 4 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm.
A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F2-GroupEXPERIMENTALHealthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 2 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 2 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm.
Naïve Placebo-A/turkey Influenza (H5N1)-F3-GroupPLACEBO_COMPARATORHealthy subjects aged 18 years of age or older at the time of vaccination received one dose of placebo (phosphate buffered saline, PBS) at Day 0 followed by two doses of A/turkey H5N1 vaccine formulation 3, one dose administered at Day 182 and the other at Day 549. Placebo vaccine and one dose of A/turkey H5N1 vaccine (Day 549) was administered intramuscularly in the deltoid region of the non-dominant arm while the other dose of A/turkey H5N1 vaccine (Day 182) was administered intramuscularly in the deltoid region of the dominant arm.

Interventions

NameTypeDescription
A/turkey H5N1 vaccineBIOLOGICALAdministered as an intramuscular (IM) injection
Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)BIOLOGICALAdministered as an intramuscular (IM) injection
PlaceboBIOLOGICALAdministered as an intramuscular (IM) injection
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites13

Inclusion Criteria: * A male or female 18 years of age or older at the time of the first vaccination. * Written informed consent obtained from the subject. * Stable health status as defined by absence of a health event satisfying the definition of a serious adverse event, or a change in an ongoing ...

Countries:United StatesCanada
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Frequently asked questions about A/turkey H5N1 vaccine

What is A/turkey H5N1 vaccine used for?

A/turkey H5N1 vaccine is an investigational vaccine being developed for influenza. It is currently in Phase 2 clinical development and is not yet approved by regulatory authorities. The vaccine is designed to provide immunity against avian flu strains, as indicated by its clinical trial evaluating immunogenicity and safety in adults.

Who makes A/turkey H5N1 vaccine?

A/turkey H5N1 vaccine is being developed by GSK plc, a biopharmaceutical company listed on the stock exchange under the ticker GSK. GSK is conducting clinical trials to evaluate the vaccine's safety and immunogenicity in adult populations.

What phase is A/turkey H5N1 vaccine in?

A/turkey H5N1 vaccine is in Phase 2 clinical development. It is an investigational vaccine, meaning it has not yet received regulatory approval. The Phase 2 trial, NCT00719043, has been completed and evaluated the vaccine's immunogenicity and safety in adults aged 18 years and older.

What clinical trials is A/turkey H5N1 vaccine in?

A/turkey H5N1 vaccine has one completed Phase 2 clinical trial, NCT00719043, titled 'Immunogenicity & Safety of GSK's Avian Flu Vaccine 1557484A Given to Adults Aged ≥18 Years.' This trial enrolled 841 participants in the United States and Canada and included healthy volunteers.

Is A/turkey H5N1 vaccine the same as 1557484A?

Yes, A/turkey H5N1 vaccine is also known as 1557484A. The clinical trial NCT00719043 refers to the vaccine as 'GSK's Avian Flu Vaccine 1557484A,' confirming that 1557484A is an alternative name for the same investigational vaccine being developed by GSK.