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Hepatitis A Vaccine, Purified Inactivated

Phase 3

Hepatitis A Virus Infection | Monoclonal antibody | Infectious Disease |Merck & Company, Inc.|Last Updated: Apr 13, 2017

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
UNCONTROLLED
Total Trials1
Total Enrollment80
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT00835380A Study of 2 Doses of VAQTA™ in Healthy Children 12 to 23 Months of Age (V251-069)PHASE3 COMPLETED 80Mar 1, 2008Oct 1, 2008Apr 13, 2017 -
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Study Endpoints
Primary Endpoints
Hepatitis A Virus (HAV) Seroconversion Rate, i.e. the Percentage of Subjects Who Were Seronegative at Baseline and Developed Seropositive at Month 7 After Administration of a 2-dose Regime of Vaccines.
Collect blood sample for HAV antibody testing at Day 0 prior to vaccination, and Month 7 (4 weeks after administration of a 2-dose regimen of vaccines at Month 6)

Seroconversion rate = (number of subjects with seronegative at baseline and developed seropositive at Month 7)/(number of subjects with seronegative at baseline regardless HAV serum status at Month 7). Measure serum HAV (hepatitis A virus) antibody at Day 0 prior to vaccination and at Month 7 after administration of a 2-dose regimen of vaccines. HAV antibody titers were determined by Wantai ELISA kit for serum antibody response to HAV. Seropositive was defined as HAV antibody titer ≥ 50 mIU/mL. Seronegative was defined as HAV antibody titer \< 50 mIU/mL.

Secondary Endpoints
Serious Adverse Experiences and Systemic Adverse Experiences Occurring Within 14 Days After Each Vaccination, and Injection-site Complaints Occurring Day 1 Through Day 5 After Each Vaccination
For serious adverse experiences and systemic adverse experiences: 14 days follow-up after each dose of vaccination; For injection-site adverse experiences: 5 days follow-up after each dose of vaccination
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposePREVENTION
Treatment Arms
ArmTypeDescription
1EXPERIMENTALVAQTA™
Interventions
NameTypeDescription
Hepatitis A Vaccine, Purified Inactivated (VAQTA™)BIOLOGICALSubjects will be given a 25-U/0.5 mL intramuscular injections of VAQTA™ at Day 1 and Month 6.
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Eligibility Criteria
Age Range12 Months — 23 Months
SexALL
Healthy VolunteersYes

Inclusion Criteria: * Healthy Chinese children 12 to 17 months old at receipt of the first study vaccination Exclusion Criteria: * Subject is Hepatitis A virus antibody positive at screening or has a history of Hepatitis A infection * Subject has a fever 72 hours prior to first injection * Subjec...

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