[Immunity to measles, mumps and rubella in children vaccinated with triple viral vaccine]. / Inmunidad frente a sarampión, rubéola y parotiditis en niños vacunados con la triple vírica.

OBJECTIVE: To check up on measles-mumps-rubella immunity in children vaccinated with MMR vaccine. DESIGN: A descriptive cross-sectional study trough seroepidemiological survey. SETTING: Oliver-Miralbueno Health Centre, Zaragoza. PATIENTS: 92 healthy children of 5, 7 and 9 years of age who went for clinical preventive services. All of them vaccinated with MMR at the age of 15 to 18 months. None of them had suffered from measles, mumps or rubella. MEASUREMENTS AND MAIN RESULTS: 1) The percentage of seronegative children (title less than 1:8) was: 9.8% for measles, 8.7% for rubella, and 27.2% for mumps. 2) As to the time differences among seropositive and seronegative children. CONCLUSIONS: The study reveals that there is a high percentage of MMR vaccinated children showing minimal or undetectable levels of antibodies.