Recall of Tripedia vaccine

On January 27, 1999, the Food and Drug Administration initiated a voluntary recall of Tripedia diphtheria and tetanus toxoids and acellular pertussis vaccine (DTaP), lot number 0916490, manufactured by Pasteur Merieux Connaught USA. Routine post-release stability testing completed in January 1999 indicated that the potency of the diphtheria toxoid component of this lot was below specification. The potency of the tetanus and pertussis components of this lot was acceptable.