There was no association between pregnant mothers who received the influenza or tetanus toxoid, reduced diphtheria toxoid and acellular pertussis (Tdap) vaccines and the risk of infant death or hospitalization, researchers found.
In the case-control study, there was no such increased risk in the first 6 months of life among infants whose mothers received these vaccines, reported Lakshmi Sukumaran, MD, of the CDC, and colleagues.