SummaryInfluenza vaccination during pregnancy decreased the incidence of acute lower respiratory tract infection hospitalizations in infants born to vaccinated mothers. The benefits of protecting against influenza virus infection during early infancy might extend beyond protecting only against influenza-confirmed illness.

Respiratory syncytial virus (RSV) infection was associated with respiratory illness during pregnancy and postpartum in women. Vaccination during pregnancy against RSV could benefit the mother, primarily against nonfebrile illness, and her infant.