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AR51

Phase 2

Bacterial Infections; Virus Diseases | Monoclonal antibody | Infectious Disease |Merck & Company, Inc.|Last Updated: Oct 30, 2015

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment1,464
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT00551629A Study to Test the Safety and Effectiveness of an Investigational Vaccine in Infants (V419-002)PHASE2 COMPLETED 708May 1, 2001Mar 1, 2003Oct 30, 2015 -
NCT00551915A Study of the Safety and Tolerability of V419 in Healthy Infants at 2,4, 6 and 12 to 14 Months of Age (V419-003)PHASE2 COMPLETED 756May 1, 2001Jan 1, 2003Oct 30, 2015 -
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Study Endpoints
Primary Endpoints
Percentage of participants with level of anti-PRP antibodies >1.0 μg/mL at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with level of anti-HBsAg antibodies ≥10 mIU/L at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with a ≥4-fold rise in levels of antibodies to pertussis antigens (toxoid [PTxd], Filamentous Hemagglutinin [FHA], Fimbria 2 & Fimbria 3 [FIM], and Pertactin [PRN]) at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with level of anti-diphtheria antibodies ≥0.01 IU/mL at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with level of anti-tetanus antibodies ≥0.01 IU/mL at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with neutralizing anti-poliovirus antibodies (Types 1, 2, and 3) at ≥1:8 dilution at the Postdose 3 time point
At 5 months of age (1 month after 3rd vaccination)
Percentage of participants with a ≥4-fold rise in levels of antibodies to pertussis antigens at the Postdose 3 time point
At 7 months of age (1 month after 3rd vaccination)
Percentage of participants with neutralizing anti-poliovirus type antibodies at ≥1:8 dilution at the Postdose 3 time point
At 7 months of age (1 month after 3rd vaccination)
Secondary Endpoints
Number of participants with at least 1 adverse event (AE)
From 1st vaccination up to 14 days following last vaccination (up to 14.5 months)
Number of participants who discontinued study treatment due to an AE
From 1st vaccination up to 14 days following last vaccination (up to 14.5 months)
Percentage of participants with level of anti-PRP antibodies >1.0 μg/mL at the Postdose 2 time point
At 6 months of age (2 months after 2nd vaccination)
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
AR51 (12, 10)EXPERIMENTALParticipants were vaccinated with 0.5 ml of AR51 (12, 10) formulation via intramuscular injection as a primary series at 2, 3, and 4 months of age, and as a booster at 12 to 14 months of age.
PR51 (3, 10)EXPERIMENTALParticipants were vaccinated with 0.5 ml of PR51 (3, 10) formulation via intramuscular injection as a primary series at 2, 3, and 4 months of age, and as a booster at 12 to 14 months of age.
PR51 (6, 10)EXPERIMENTALParticipants were vaccinated with 0.5 ml of PR51 (6, 10) formulation via intramuscular injection as a primary series at 2, 3, and 4 months of age, and as a booster at 12 to 14 months of age.
PR51 (6, 15)EXPERIMENTALParticipants were vaccinated with 0.5 ml of PR51 (6, 15) formulation via intramuscular injection as a primary series at 2, 3, and 4 months of age, and as a booster at 12 to 14 months of age.
PENTACEL™ + RECOMBIVAX HB™ACTIVE_COMPARATORParticipants were vaccinated with 0.5 ml each of PENTACEL™ + RECOMBIVAX HB™ via intramuscular injection as a primary series at 2, 4, and 6 months of age, and with 0.5 ml PENTACEL™ as a booster at 12 to 14 months of age.
Interventions
NameTypeDescription
AR51 (12, 10)BIOLOGICALvaccine formulation containing 12 mcg of PRP-T and 10 mcg of HBsAg
PR51 (3, 10)BIOLOGICALvaccine formulation containing 3 mcg of PRP-OMPC and 10 mcg of HBsAg
PR51 (6, 10)BIOLOGICALvaccine formulation containing 6 mcg of PRP-OMPC and 10 mcg of HBsAg
PR51 (6, 15)BIOLOGICALvaccine formulation containing 6 mcg of PRP-OMPC and 15 mcg of HBsAg
PENTACEL™BIOLOGICALlicensed vaccine for diphtheria, tetanus, pertussis, poliomyelitis, and invasive disease due to Haemophilus influenzae type b, administered open-label
RECOMBIVAX HB™BIOLOGICALlicensed vaccine for hepatitis, administered open-label
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Eligibility Criteria
Age Range6 Weeks — 9 Weeks
SexALL
Healthy VolunteersYes

Inclusion Criteria: * Healthy infants 2 months of age who have not received prior vaccinations for Haemophilus influenzae type b (Hib), hepatitis B, Diptheria/Pertussis/Tetanus (DPT), or Polio Exclusion Criteria : * Documented HIV infection (child or mother) * Documented HBsAg-seropositivity (chi...

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