The mission of the Medical Reserve Corps (MRC) is to engage volunteers to strengthen public health, emergency response and community resiliency. MRC units are community-based and function as a way to locally organize and utilize volunteers who want to donate their time and expertise to prepare for and respond to emergencies and promote healthy living throughout the year. MRC volunteers supplement existing emergency and public health resources.

MRC volunteers include medical and public health professionals such as physicians, nurses, pharmacists, dentists, veterinarians, and epidemiologists. Many community members—interpreters, chaplains, office workers, legal advisors, and others—can fill key support positions.