The Centers for Disease Control and Prevention (CDC) recently investigated Tdap vaccination coverage around the time of pregnancy for more than 6,800 women who gave birth in 2011 in one of 16 states or New York City. The Advisory Committee on Immunization Practices recommended in July 2011 one dose of a Tdap vaccine during pregnancy for women who had not been vaccinated before and, in 2012, that recommendation was expanded to advise women to receive the Tdap vaccine during each pregnancy, to provide maternal antibodies for each infant. For the 17 jurisdictions studied, the median percentage of women with live births who reported any Tdap vaccination was 55.7 percent. The rate varied widely, however, with 38.2 percent in New York City and 76.6 percent in Nebraska. About 13.9 percent of women received Tdap before pregnancy, compared with 9.8 percent who received it during pregnancy and 30.9 percent who received it after delivery. According to the CDC, findings also showed wide variation among different demographic groups, and 20 percent did not know their vaccination status. Read more online in the CDC’s Morbidity and Mortality Weekly Report on the subject.