Epidemic - An often sudden increase in the level of disease in a specific population over a given period of time.⏎
Genetics - A branch of biology that studies heredity and variation in organisms.⏎
Ecology - A branch of science that deals with the relation of organisms to one another and their physical environment.⏎
Encephalitis - Inflammation of the brain, often caused by a virus.⏎
Endemic - The baseline level of disease usually present in a community.⏎