when was tdap approved
April 20, 2009 â The tetanus toxoid/reduced diphtheria toxoid/acellular pertussis single-dose booster vaccine (Tdap; Boostrix, GlaxoSmithKline Biologicals) was approved for an expanded age indication (10 â 64 years) by the US Food and Drug Administration (FDA), on December 4, 2008, according to an article published in the April 17 issue of the Morbidity and Mortality Weekly Report.