Tornadoes killed at least 17 people on Sunday and Monday. But some managed to stay safe in underground shelters like the one at right in Vilonia, Ark. Karen E. Segrave/AP hide caption

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Kelly Koshuta, a basketball star at James Madison High School, Vienna, Va., had surgery to repair an anterior cruciate ligament injured in 2012. Sarah L. Voisin/The Washington Post hide caption

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Testosterone levels in men can go up and down throughout the day. Katherine Streeter for NPR hide caption

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Test First Before Going For Those Testosterone Supplements

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Testosterone, The Biggest Men's Health Craze Since Viagra, May Be Risky

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Fear Of Addiction Means Chronic Pain Goes Untreated

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There today, here tomorrow: A mother holds her child for a measles vaccination in Manila, Philippines, in January. Travelers are bringing measles from the Philippines to the United States. Noel Celis/AFP/Getty Images hide caption

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A woman tries electronic cigarettes at a store in Miami. Joe Raedle/Getty Images hide caption

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FDA Moves To Regulate Increasingly Popular E-Cigarettes

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