title: Serological survey of incidence of ECHO 7 infection.
mesh_terms: D000328:Adult; D000906:Antibodies / Q000032:analysis; D004457:Echovirus Infections / Q000453:epidemiology*; D029822:Enterovirus B, Human / Q000276:immunology / Q000302:isolation & purification; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007194:India; D007201:Indicator Dilution Techniques
chemical_list: D000906:Antibodies