Pertussis (Whooping Cough) – What You Need To Know - From the CDC (Centers for Disease Control and Prevention). This has some great links to audio files of what whooping cough sounds like.
Here are some Morbidity and Mortality Weekly Report (MMWR) - Notes from the Field: Pertussis --- California, January--June 2010.
If you're really into learning more, from a science and medicine perspective, read this interesting Science-Based Medicine blog post, Californians give a whoop – or I hope they do.
Additional References:
The FDA webpages on Vaccines, Blood & Biologics
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