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  • Title: Safety and immunogenicity of concurrent administration of measles-mumps-rubella-varicella vaccine and PedvaxHIB vaccines in healthy children twelve to eighteen months old. The MMRV Study Group.
    Author: Reuman PD, Sawyer MH, Kuter BJ, Matthews H.
    Journal: Pediatr Infect Dis J; 1997 Jul; 16(7):662-7. PubMed ID: 9239770.
    Abstract:
    OBJECTIVE: To determine the safety and immunogenicity of concurrent administration of measles-mumps-rubella-varicella vaccine (MMRV) and PedvaxHIB (Haemophilus influenzae type b conjugate vaccine) vs. M-M-R II and PedvaxHIB followed by an optional dose of VARIVAX 6 weeks later. DESIGN: Healthy children, 12 to 18 months of age, were randomly assigned to two groups to receive (1) MMRV and PedvaxHIB given concurrently or (2) M-M-R II and PedvaxHIB followed by an optional dose of VARIVAX 6 weeks later. SUBJECTS: The study group included 294 healthy children, ages 12 to 18 months, with a negative history of measles, mumps, rubella and varicella. MAIN OUTCOME MEASURES: The seroconversion rate and magnitude of antibody responses when MMRV was given concurrently with PedvaxHIB compared with the antibody responses when VARIVAX was given 6 weeks after M-M-R II and PedvaxHIB. RESULTS: Healthy children, 12 to 18 months of age, who received MMRV and PedvaxHIB concurrently showed immune responses similar to those in the control group who received M-M-RII vaccine with PedvaxHIB followed by VARIVAX 6 weeks later. Antibody titers for varicella were significantly lower when MMRV was administered than when varicella vaccine was given separately (0.712-fold difference, P = 0.028). No vaccine-related serious adverse reactions were reported, and no clinically significant differences were seen in the safety profiles of the two treatment groups. CONCLUSIONS: There were no statistically significant differences in the seroconversion rates between the two treatment groups for any of the antigens tested at 6 weeks and 1 year. Significantly lower geometric mean titers for varicella were noted in the group who received MMRV compared to VARIVAX given alone. Six-week seroconversion rates, persistence of immune responses at 1 year and the frequency of local and systemic reactions were comparable when MMRV was administered with PedvaxHIB compared with M-M-R II and PedvaxHIB followed by VARIVAX 6 weeks later.
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