A: Rest easy -- as part of routine testing, the makers of the Hib vaccine found certain bacteria in their manufacturing equipment. However, the microorganisms were not in the vaccines themselves, and there have been no reports of any related infections in children, according to the Centers for Disease Control and Prevention. If the germs had in fact contaminated vaccines, they would have caused only a skin infection in otherwise healthy children. In fact, parents should actually be reassured by this recall -- it demonstrates that the FDA and vaccine manufacturers respond quickly to a potential problem, even if there's no evidence that kids have been harmed. Moreover, the FDA requires that manufacturers test samples from each lot of vaccines for safety, potency, and purity before it is distributed.
Originally published in Parents magazine, March 2008. Updated 2009