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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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More than three quarters of new babies get at least a start at breast-feeding, according to the CDC. iStockphoto.com 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

itoggle caption Carrie Feibel/KUHF

Employees at a Papa John's in New Hyde Park, N.Y., make pizzas in 2012. Restaurant employees have been a focus of debate on Obamacare coverage. Kathy Kmonicek/Invision/AP hide caption

itoggle caption Kathy Kmonicek/Invision/AP

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

itoggle caption Alastair Grant/PA Photos /Landov

Some images of lung cancer are clear cut. But in many others, a nodule on the screen turns out not to be cancer at all. iStockphoto.com hide caption

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Volunteer Tammy Spencer goes door to door in Boca Raton., Fla., on July 27 to spread the word on the state's health exchange. Phil Galewitz/Kaiser Health News hide caption

itoggle caption Phil Galewitz/Kaiser Health News

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

itoggle caption Marilyn Nieves/iStockphoto.com

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

itoggle caption AP