A Phase 3a, Observer-blind, Randomized, Controlled Study to Demonstrate Lot-to-lot Consistency and Evaluate the Immunogenicity and Safety of an Investigational Combined Measles, Mumps, Rubella and Varicella Vaccine Compared With ProQuad, Administered as a Second Dose in Healthy Children 4-6 Years of Age

Summary

The purpose of this study is to evaluate how consistently 3 different manufacturing lots of the GSK's investigational measles, mumps, rubella, and varicella (MMRVNS) vaccine will produce an immune response. It will also compare the overall immune response to the MMRVNS vaccine with that of the Merck licensed measles, mumps, rubella, and varicella (MMRV) vaccine. The vaccines will be given as a second dose to children aged 4 to 6 years who have previously received a first dose of any combination of measles, mumps, rubella, and varicella-containing vaccine(s). The study will also assess the immune response and safety of the MMRVNS and MMRV vaccines when given at the same time as a diphtheria, tetanus, acellular pertussis, and inactivated poliovirus (DTaP-IPV) vaccine. The DTaP-IPV vaccine used is licensed as Kinrix in the United States.

Eligibility

Age range

4–6 years

Sex