Association Between First MMR Vaccination Before Age 2 Years and Childhood Autism in a U.S. EHR Cohort of 2.5 Million Children A retrospective cohort study using the Cosmos electronic health record database, including 2,560,035 US children www.ovid.com/jnls/pidj/ab...
Association Between First MMR Vaccination Before... : Pediatric Infectious Disease Journal
Background:Concerns about potential associations between measles–mumps–rubella (MMR) vaccination and autism persist despite extensive prior research....
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