Study Status: Completed
Recruit Status: Completed
Study Type: Observational
Official Title: A Serological Study of Measles, Mumps and Rubella in Children 12 to 23 Months Vaccinated With MMR (Measles, Mumps and Rubella) in Health Centers Where a Phase III Study Should be Conducted
Brief Summary: On a previous study conducted in Brazil. The MMR vaccine from 2 different producers had a mumps seroconversion much lower (71%) than the expected 95%, according to the package insert. This could indicate that a substantial proportion of children was not protected after MMR dose.