A delayed schedule for administering certain vaccines in a child's second year was linked to a higher risk of experiencing febrile seizure compared with the usual vaccine schedule, U.S. researchers found. The relationship held for the measles, mumps, rubella vaccine and the vaccine for measles, mumps, rubella, and varicella. The findings, based on 324,000 children, were presented at the Pediatric Academic Societies meeting.

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