Advocates for patient safety have had to confront the reality that steps taken to improve the quality of health care can also present opportunities for corruption and conflict of interest. Pascal Fossier/Ikon Images/Corbis hide caption

itoggle caption Pascal Fossier/Ikon Images/Corbis

Norma Melendez, a community health worker with City Health Works, walks along Second Avenue on her way to meet a client. City Health Works is an organization that is attempting to bring an African model of health care delivery to the United States. Bryan Thomas for NPR hide caption

itoggle caption Bryan Thomas for NPR

Women who consume eight or more drinks per week are considered excessive drinkers, according to the CDC. Breast cancer, liver disease and heart disease have all been linked to excessive drinking over time. Ann Boyajian/Illustration Works/Corbis hide caption

itoggle caption Ann Boyajian/Illustration Works/Corbis

This Chinese teenager weighs 353 pounds. At a "slimming center" in China's central Hubei province, he's exercising and undergoing acupuncture to lose weight. Color China/AP hide caption

itoggle caption Color China/AP