Health care delivery is expected to change, with more care provided by nurse practitioners and fewer people having a doctor for life. Images.com/Corbis hide caption

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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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The audience concentrates on a presentation by Kansas Insurance Commissioner Sandy Praeger's office about the federal health care overhaul at the University of Kansas satellite campus in Overland Park, Kan., earlier this month. John Hanna/AP hide caption

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Kombucha made by artisan tea brewer Bill Bond in Akron, Ohio, comes in an array of flavors, such as lemongrass, ginger, blueberry and watermelon. Peggy Turbett/The Plain Dealer /Landov hide caption

itoggle caption Peggy Turbett/The Plain Dealer /Landov

Experts say lots of factors determine how quickly an oil deteriorates — from the variety of the olives, to how the oil is produced and stored. Matthias Schrader/AP hide caption

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New York City's Montefiore Medical Center, located in the Bronx, has one of the busiest emergency rooms in the nation. Robert Benson/ 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

itoggle caption John T. Consoli/University of Maryland