[Solved] Structure F on the skin diagram is a(n) A) oil gland. B) sweat gland. C) sensory receptor. D) wax gland. E) naked nerve ending. Epidemic: An outbreak of a disease that spreads rapidly and affects a large number of individuals within a population, community, or region. Pandemic: An outbreak of a disease that occurs over a wide geographic area and affects an exceptionally high proportion of the population. Incidence Rate: The frequency at which new cases of a condition or disease occur in a specific population over a particular period of time. Health Department: A government agency at various levels (local, state, national) responsible for public health policies, regulations, and community health services.