A closed epidemic of acute aseptic meningitis caused by ECHO virus type 4. I. Epidemiological and clinical studies.
D029822:Enterovirus B, Human; D058872:Epidemics; D008581:Meningitis / Q000453:epidemiology*; D008582:Meningitis, Aseptic; D014777:Virus Diseases / Q000453:epidemiology*
MENINGITIS/epidemiology; VIRUS DISEASES/epidemiology