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Should I worry about other vaccines not being sterile?

The recent recall of Hib vaccines was scary. Should we worry that other vaccines might not be sterile?
Submitted by Parents Team

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

The answers from our experts are for educational purposes only. Please always refer to your child's pediatrician and mental health expert for more in-depth advice.

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