Bird flu, malaria, plague and West Nile virus are infectious diseases we've all heard of. Find information on these epidemics and more in this section.

How Leper Colonies Work

Leprosy was the AIDS of the first millennium – a disfiguring disease that struck terror since people thought it was easy to contract. Patients were banished to live in leper colonies. What was life like there?

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  • Does SARS have an effect on white blood cells?

    Does SARS have an effect on white blood cells?

    SARS causes a low white blood cell count. Learn more about how SARS affects white blood cells from this article. See more »

  • Facts About Pneumonic Plague

    Facts About Pneumonic Plague

    If you symptoms of the pneumonic plague, you should seek expert help immediately. Check out facts, tips, and preventative information about the pneumonic plague. See more »

  • History of Black Plague

    History of Black Plague

    It was said that the cause of the black plague was a particularly sinister alignment of the planets, or a foul wind created by recent earthquakes. Learn more about the history of the black plague and how this disease spread. See more »

  • How does a virus behave in the body?

    How does a virus behave in the body?

    In general, people are at their most contagious approximately three days after having been exposed to a virus. You can learn more about how a virus behaves in the body from this article. See more »

  • How does the flu spread?

    How does the flu spread?

    Flu season in North America usually begins in November and runs until March. Learn more about how the flu spreads from this article. See more »

  • Is there a SARS vaccine?

    Is there a SARS vaccine?

    Researchers developed a safe and effective SARS vaccine. Learn more about SARS vaccine from this article. See more »

  • What causes cold sores?

    What causes cold sores?

    Cold sores are painful blisters that appear on or around the lips. Learn what causes cold sores in this article. See more »

  • What is foot-and-mouth disease?

    What is foot-and-mouth disease?

    Foot-and-mouth diseases is a pretty odd-sounding name. So what is this condition? See more »

  • What is the Flu?

    What is the Flu?

    Flu is short for influenza virus. Learn how the flu virus works and why antibiotics won't help you fight it. See more »

  • What is the SARS conspiracy theory?

    What is the SARS conspiracy theory?

    There are several SARS conspiracy theories, including the act of biological warfare by the United States. Learn more about the SARS conspiracy theory from this article. See more »

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