The purpose of the study is to evaluate the immunogenicity and safety of Kinrix when co-administered with varicella (Varivax® [varicella virus vaccine live], Merck and Company) and (measles mumps rubella) MMR vaccines, compared to Kinrix co-administered with MMR vaccine alone.

Both Kinrix and the second dose of Varivax are indicated in children 4-6 years of age, and there is great potential for the vaccines to be given concurrently.

The aim of this trial is to demonstrate that co-administered Varivax does not negatively affect the immunogenicity or reactogenicity of Kinrix.

Results:

Vaccine published the results of this clinical trial on January 11, 2012.

Results: We enrolled 478 subjects. One month post-vaccination, >95% of subjects in both groups had booster responses to diphtheria, tetanus and pertussis antigens and all subjects had seroprotective anti-poliovirus antibody titers. Immune responses in Group 1 were non-inferior to Group 2 for responses to DTaP-IPV antigens according to pre-specified criteria.

Reporting of solicited local events at the DTaP-IPV site appeared to be similar between the two vaccine groups, as was reporting of solicited general adverse events within 4 days of vaccination; no vaccine-related SAEs were reported.

Conclusion: Concomitant administration of varicella vaccine with Kinrix™ and MMR did not impact the immunogenicity of diphtheria, tetanus, pertussis, or poliovirus antigens.

Both vaccine regimens were well tolerated. These results support the co-administration of DTaP-IPV, MMR, and V vaccines in 4-6-year-old children, providing protection against multiple diseases in a timely and efficient manner.