Taking advantage of a robust electronic medical record system at Intermountain Healthcare facilities in Utah, Shakib et al performed a retrospective cohort study assessing pregnancy, birth, and infancy outcomes for 138 women who were given tetanus and reduced-content diphtheria toxoids and reduced-content acellular pertussis vaccine (Tdap) compared with 552 randomly selected nonvaccinated pregnant women controls. The study, ending in 2009, was performed before routine recommendation for Tdap administration during pregnancy. The most common reason for Tdap was prophylaxis for open wounds or during acute care visits for trauma. Of pregnant women receiving Tdap, 63% received the vaccine during the first trimester.
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