U.S. House Majority Leader Rep. Eric Cantor (center) and colleagues gather before a Sunday vote on Capitol Hill. The House passed two new provisions to a federal spending bill to delay Obamacare for a year and to repeal the medical device tax. Alex Wong/Getty Images hide caption

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A student gets vaccinated against pertussis at a Los Angeles middle school in 2012. The state required that students be immunized to halt an epidemic of whooping cough. Kevork Djansezian/Getty Images hide caption

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University of Maryland's Jaydev Desai shows off a prototype of a robot that he and colleagues are developing to minimize harm to patients during brain surgery. John T. Consoli/University of Maryland hide caption

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Streptococcus pyogenes shouldn't be taken lightly. Left untreated, an infection with germ can trigger an autoimmune disease that damages the heart. NIAID/Flickr.com hide caption

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A broken hip like the one at left is a big health worry for older women. iStockphoto.com hide caption

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CPAP masks have become much more comfortable than in years past, doctors say. But most of the time, they're probably not the first thing to try for sleep apnea. iStockphoto.com hide caption

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A doctor takes an HIV test from an athlete during the 18th National Sports Festival in Lagos, Nigeria, last December. Sunday Alamba/AP hide caption

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Nature writer Jackson Landers kept a black widow alive in a jar on his desk for months. Courtesy Jackson Landers hide caption

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Scoliosis didn't keep golfer Stacy Lewis from becoming a top-ranked pro. She spent almost eight years wearing a back brace, yet still had to have surgery. Jonathan Ferrey/Getty Images hide caption

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Differences in brain chemistry can affect an individual's likelihood of weight gain. Katherine Streeter for NPR hide caption

itoggle caption Katherine Streeter for NPR

A sign outside a medical marijuana dispensary in Manitou Springs, Colo. Voters amended the state's constitution to legalize marijuana for recreational use in November 2012. Eric Whitney hide caption

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A Thai medic checks bodies for forensic identity in Phang Nga province in southern of Thailand on Jan. 11, 2005. Thousands of people were killed in Thailand after a massive tsunami struck on Dec. 26, 2004. Pornchai Kittiwongsakul/AFP/Getty Images hide caption

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