Concomitant Use of Hepatitis A Vaccine, Inactivated With Haemophilus b Conjugate Vaccine (Meningococcal Protein Conjugate) and Diphtheria and Tetanus Toxoids and Acellular Pertussis Vaccine Adsorbed Given to Healthy Children 15 Months of Age (V251-068)

Merck Sharp & Dohme LLC1,274 enrolled

Overview

This two-stage study evaluates the immunogenicity, safety, and tolerability of the administration of VAQTA™ (Hepatitis A Vaccine, Inactivated) concomitantly with PedvaxHIB™ (Haemophilus B Conjugate Vaccine \[Meningococcal Protein Conjugate\]) and Infanrix™ (Diphtheria and Tetanus Toxoids and Acellular Pertussis Vaccine Adsorbed, GlaxoSmithKline) versus the administration of VAQTA™ in healthy children 15 months of age at study entry.

In stage I, VAQTA™ given concomitantly with Infanrix™ and/or PedvaxHIB™ was evaluated. In stage 2: Two (2) doses of the VAQTA™ vaccine were administered at least 6 months apart. Safety data was collected after each dose.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Enrollment

1,274

Conditions

Hepatitis A Virus

Interventions

Eligibility

Sex: ALLMin age: 12 MonthsMax age: 17 MonthsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Stage 1) Healthy males and females 15 months of age with no active liver disease and a negative history of hepatitis A who have been vaccinated against Haemophilus influenzae type b (Hib), diphtheria, tetanus, and pertussis diseases * Stage 2) Healthy males and females 12 to 17 months of age with no active liver disease and a negative history of hepatitis A Exclusion Criteria: * Stage 1) Males and females previously vaccinated with hepatitis A vaccine, any immune deficiency, a history of allergy to any of the vaccine components, a history of seizure disorder or a neurologic disorder that would contraindicate pertussis vaccine, or a bleeding disorder * Stage 2) Males and females previously vaccinated with hepatitis A vaccine, any immune deficiency, a history of allergy to any of the vaccine components, or a history of bleeding disorder

Outcomes

Primary Outcomes

Seropositivity Rate (SPR) to Hepatitis A

SPR is the percent of participants with Hepatitis A antibody titers \>= 10 milli-International Units/milliliter (mIU/mL), 4 weeks after dose 2 of VAQTA™ regardless of their initial serostatus. Antibody titers to Hepatitis A virus (HAV) were detected in participants' serum samples using an Enzyme Immunoassay (EIA).

Time frame: 4 weeks after dose 2 of VAQTA™

Antibody Response Rate to Haemophilus Influenzae Type b (Hib)

Antibodies to the Hib capsular polysaccharide (polyribosylribitol phosphate \[PRP\]) are assessed in participants serum using radioimmunoassay (RIA). The limit of detection (LOD) for the RIA is 6.60 ng/mL. The antibody response rate is defined as the percentage of participants with anti-PRP titers \>1.0 mcg/mL, 4 weeks postvaccination with PedvaxHIB™.

Time frame: 4 weeks postvaccination with PedvaxHIB™

Number of Participants With Adverse Events (AE)

Systemic and injection site AEs were collected from participants receiving * VAQTA™ concomitantly with Infanrix™ and PedvaxHIB™ or PedvaxHIB™ (Stage I) * VAQTA™ non-concomitantly with Infanrix™ and PedvaxHIB™ or PedvaxHIB™ (Stage I) * VAQTA™ administered alone (Stage II) Safety data was collected on a standardized Vaccination Report Card (VRC) following each dose. Participants returned the VRC after the safety follow-up period for each dose of VAQTA™. AEs determined by the investigator to be possibly, probably or definitely related to the vaccine are reported as Vaccine-related AE.

Time frame: Days 1 to 14 after any dose of VAQTA™ for systemic AEs, and Days 1 to 5 after any dose of VAQTA™ for injection-site AEs

Geometric Mean Titers (GMTs) to Antibodies for the Pertussis Toxin (PT), Pertussis Filamentous Hemagglutinin Antibody (FHA), and Pertactin (PRN) Components of Infanrix™

GMTs for antibodies to PT, FHA, and PRN were measured in serum samples of participants vaccinated with Infanrix™. IgG antibodies to PT were assessed using the anti-pertussis toxin enzyme-linked immunosorbent assay (anti-PT ELISA), with the LOD of 2.4 ELU/mL. IgG antibodies to FHA were assessed using the anti-pertussis filamentous hemagglutinin enzyme-linked immunosorbent assay (anti-FHA ELISA), with the LOD of 2.0 ELU/mL. IgG antibodies to PRN were assessed using the anti-pertussis pertactin enzyme-linked immunosorbent assay (anti-PRN ELISA), with the LOD of 3.3 ELU/mL.

Time frame: 4 weeks postvaccination with Infanrix™