Influenza Vaccinations for All Pregnant Women? Better Evidence Is Needed.

Indeed, investigating the association between influenza infection and vaccination during pregnancy and autism spectrum disorder (ASD) risk in a cohort study of 196,929 children born at Kaiser Permanente Northern California, Zerbo and colleagues [ 16 ] found that influenza vaccination anytime during pregnancy was not associated with ASD risk (the adjusted HR was of borderline significance: 1.10; 95% CI 1.00–1.21).

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It can be noted that, while the differences for all these outcomes did not reach statistical significance, their tendencies were often not in the expected and desired direction.

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