MMR vax later lowers teen measles risk
The matched case-control study involved 102 measles cases and 510 controls. It showed that in patients who had measles — 89% of whom were aged 13 to 17 — those who were given the MMR at 12 to 13 months had fivefold higher odds of contracting measles compared to those vaccinated at 15 months or older.
Professor Robert Booy, head of clinical research at the National Centre for Immunisation Research and Surveillance said measles was more severe in babies under 12 months of age and in adults. “At least 90% of