Pfizer's maternal RSV vaccine effective at preventing severe infections in newborns, FDA says, but flags potential risk of preterm birth

Pfizer's vaccine to protect newborns from respiratory syncytial virus, or RSV, by vaccinating their moms late in pregnancy cuts the risk that infants will need to see a doctor or be admitted to the hospital with a moderate to severe infection before 6 months of age, according to a new analysis by government regulators.

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