Dataset from Comparative Study Evaluating the Immunogenicity and Safety of MeMuRu-OKA Vaccine and Measles-mumps-rubella Vaccine (Priorix™) Co-administered With Varicella Vaccine (Varilrix™) in Children Primed With Measles-mumps-rubella Vaccine

As measles-mumps-rubella (MMR) vaccination is established as routine childhood practice in most industrialised countries and varicella vaccination is now being introduced in many countries during the second year of life, a combined measles-mumps-rubella-varicella vaccine was developed for administration convenience and improved compliance to vaccination. To account for situations where children have received a first dose of MMR vaccine without varicella, this study will evaluate the effect of the combined measles-mumps-rubella-varicella vaccine given in place of the second dose of MMR vaccine. A second dose of the monovalent varicella vaccine will be given to all children participating to this trial since there is a current debate on the need of a second dose to induce a full protection against varicella.