The bite of a cobra can paralyze its victims and, if enough venom is released, fatally stop their breathing. It's estimated that more than 75 percent of patients in India who die from a snake's bite never make it to the hospital. STRDEL/AFP/Getty Images hide caption

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Ali Maow Maalin said he avoided getting the smallpox vaccine as a young man because he was afraid of needles. He didn't want others to make the same mistake with polio. Courtesy of the World Health Organization hide caption

itoggle caption Courtesy of the World Health Organization

Laura Molina, 9, shows the mask she created expressing the feeling of "sadness." Her mother is being treated for breast cancer at the Lyndon B. Johnson public hospital in Houston. Carrie Feibel/KUHF hide caption

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Angelina Jolie took a genetic test to find out her risk of breast cancer, and had a preventive double mastectomy. Alastair Grant/PA Photos /Landov hide caption

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The American Academy of Pediatrics recommends that children have no more than two hours a day of "screen time." Marilyn Nieves/iStockphoto.com hide caption

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Johnson with her fellow researcher and sometimes husband, William Masters. The pair helped legitimize the study of human sexuality. AP hide caption

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The Plan B One-Step morning-after pill will now be available to women as young as 15 without a prescription, and will have another three years of protection from generic competition. AP hide caption

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Can "Parks and Rec" star Amy Poehler make health insurance fun, or at least funny? Evan Agostini/Invision/AP hide caption

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Ads often tout dietary supplements and vitamins as "natural" remedies. But studies show megadoses of some vitamins can actually boost the risk of heart disease and cancer, warns Dr. Paul Offit. iStockphoto.com hide caption

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