An open-label, randomized, multi-center study of the immunogenicity and safety of DTaP-IPV (Kinrix™) co-administered with MMR vaccine with or without varicella vaccine in healthy pre-school age children.

BACKGROUND

In the US, it is recommended that 4-6 year old children receive diphtheria-tetanus-acellular pertussis (DTaP), inactivated poliovirus (IPV), measles-mumps-rubella (MMR), varicella (V), and influenza vaccines. Data relating to the concomitant administration of combination DTaP-IPV vaccine (Kinrix™; GlaxoSmithKline Biologicals) and influenza or V vaccines are currently limited. This study was undertaken to evaluate the immunogenicity and reactogenicity of Kinrix™ when co-administered with MMR (M-M-RII(®), Merck & Co.) and Varivax™ (Merck & Co.) in 4-6 year old children.

METHODS

Phase IIIb, open-label, non-inferiority study (NCT00871117). We randomized (1:1) healthy 4-6 year olds to receive Kinrix™+MMR+V on day 0 (Group 1), or Kinrix™+MMR on day 0, followed by V at month 1 (Group 2). We measured DTaP-IPV immunogenicity before and 1 month post-vaccination (prior to V vaccination in Group 2). We collected local and general solicited symptoms within 4 days after vaccination and serious adverse events (SAEs) through 6 months post-vaccination.

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.