[NATURAL FOCI OF INFECTION].
D000818:Animals; D003140:Communicable Disease Control; D004660:Encephalitis; D004671:Encephalitis, Arbovirus; D058872:Epidemics; D006801:Humans; D007303:Insect Vectors
COMMUNICABLE DISEASE CONTROL; ENCEPHALITIS, EPIDEMIC; INSECT VECTORS
ESTESTVENNYE OCHAGI INFEKTSI I.