Medical residents including Dr. Amy Ho (bottom right) helped with first aid at the Pitchfork Music Festival in Chicago. Courtesy Amy Ho hide caption

itoggle caption Courtesy Amy Ho

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