An artist on Rio de Janeiro's Copacabana beach puts the final touches on a sand sculpture of the assassin bug, which spreads Chagas disease. The sculpture was part of an event in 2009 commemorating the 100th anniversary of the discovery of the disease. Vanderlei Almeida/AFP/Getty Images hide caption

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An image of Mycobacterium tuberculosis bacteria captured with an electron microscope. CDC hide caption

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TB That Resists All Drugs Is Found In India

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H5N1 avian flu viruses (seen in gold) grow inside canine kidney cells (seen in green). Cynthia Goldsmith/CDC hide caption

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U.S. Says Details Of Flu Experiments Should Stay Secret

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What's in this vial changes from year to year, but the process of creating the flu vaccine remains pretty constant.

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