President Obama marked World AIDS Day Thursday by announcing plans to boost U.S. efforts to fight AIDS at home and abroad. Evan Vucci/AP hide caption

itoggle caption Evan Vucci/AP

Do you really need that MRI, or is your doctor just trying to make a buck? iStockphoto.com hide caption

itoggle caption iStockphoto.com

Orphaned children are cared for at the Baphumelele Center, which assists people affected by AIDS in South Africa. The Global Fund is short on AIDS funding, preventing it from funding new programs. Schalk van Zuydam/AP hide caption

itoggle caption Schalk van Zuydam/AP

Kate Donnellon Nail, 43, works out regularly and eats well. She never thought she would have a problem conceiving a child. Anna Kuperberg/www.kuperberg.com hide caption

itoggle caption Anna Kuperberg/www.kuperberg.com

The Centers for Medicare and Medicaid Services says it will cover screening and counseling for obesity as a free preventive service for Medicare beneficiaries. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

The latest numbers from CDC show that only 28 percent of the nation's 1.2 million HIV-infected people are getting effective antiviral treatment; effective treatment rates are lowest among African-American men. Robyn Beck/AFP/Getty Images hide caption

itoggle caption Robyn Beck/AFP/Getty Images

Babies sleeping with their parents risk death, according to an ad campaign by the Milwaukee Health Department. Courtesy of the Milwaukee Health Department hide caption

itoggle caption Courtesy of the Milwaukee Health Department