A construction worker paints walls at the Maryland Proton Treatment Center in Baltimore. Each of the center's five rooms will contain a massive piece of equipment that will rotate around a cancer patient to deliver a special kind of radiation. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Patients wait in line at Nuestra Clinica Del Valle in San Juan, Texas, in September 2012 file photo. A study released on Wednesday finds that immigrants, particularly noncitizens, heavily subsidize Medicare, and that policies that restrict immigration may deplete Medicare's financial resources. Eric Gay/AP hide caption

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To fight antibiotic-resistant staph germs like these, a study suggests disinfecting the skin of all intensive care patients. Janice Carr/CDC hide caption

itoggle caption Janice Carr/CDC

A nurse walks towards the Roger Salengro Hospital in Lille, France, where two patients were diagnosed with a coronavirus related to SARS. Michel Spingler/AP hide caption

itoggle caption Michel Spingler/AP

Going to the doctor may be uncomfortable for people who are worried about weight. iStockphoto.com hide caption

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Peter Lee, executive director of Covered California, unveiled the plans and prices that will be offered by private insurers at a media briefing in Sacramento on Thursday. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Fungi (cyan) surround a human hair within the skin. A study in the journal Nature shows the population of fungi on human skin is more diverse that previously thought. Alex Valm, Ph.D. hide caption

itoggle caption Alex Valm, Ph.D.

Luke Tanner, 7, gets vaccinated for measles at a clinic near Swansea, Wales, in April. Wales is at the center of a measles outbreak that has been linked to one death. Geoff Caddick/AFP/Getty Images hide caption

itoggle caption Geoff Caddick/AFP/Getty Images

Group houses are becoming popular — again — among some single baby boomers, and not just for financial reasons. Marianne Kilkenny (second from right) shares her home in Asheville, N.C, with four other people. Mike Belleme/The New York Times hide caption

itoggle caption Mike Belleme/The New York Times

Protesters march on the Texas Capitol in Austin on March 5, demanding that lawmakers expand Medicaid to include an additional 1.5 million poor people. Eric Gay/AP hide caption

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