To the Editor In the cohort study by Zerbo et al “Association Between Influenza Infection and Vaccination During Pregnancy and Risk of Autism Spectrum Disorder,”1 the authors found that “influenza vaccination anytime during pregnancy was not associated with ASD [autism spectrum disorder] risk,” although the adjusted hazard ratio was of borderline significance (1.10; 95% CI, 1.00-1.21).
Donzelli A, Schivalocchi A, Battaggia A. Influenza Vaccination in the First Trimester of Pregnancy and Risk of Autism Spectrum Disorder. JAMA Pediatr. 2017;171(6):601. doi:10.1001/jamapediatrics.2017.0753
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