Association Between Influenza Infection and Vaccination During Pregnancy and Risk of Autism Spectrum Disorder

“In trimester-specific analyses, first-trimester influenza vaccination was the only period associated with increased ASD risk (adjusted hazard ratio, 1.20; 95% CI, 1.04-1.39).”

[20% increased risk of autism spectrum disorder for mothers receiving a flu shot in their first trimester, versus mothers who naturally got the flu.]

JAMA Pediatrics

 

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