Abstract
To find out seropositivity rates at 4-6 and 9-12 years of age; among those who received one-dose measles at 9 months and one-dose MMR at 15 months of age. 80 healthy children (53 males) at 4-6 or 9-12 years of age, attending outpatient department for vaccination were enrolled. Antibody titers were estimated using commercially available quantitative-IgG ELISA kits. The seropositivity rates against measles, mumps, rubella were 80% (40/50), 86% (43/50), and 96% (48/50), respectively at 4-6 years, and 83.3% (25/30), 96.7% (29/30) and 96.7% (29/30), respectively at 9-12 years of age. Single dose of rubella vaccine seems to provide adequate long-term protection; however, measles vaccine requires more doses for similar protection.
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