title: A study of inapparent infection in smallpox.
mesh_terms: D000293:Adolescent; D000328:Adult; D000906:Antibodies / Q000032:analysis; D002648:Child; D003168:Complement Fixation Tests; D004196:Disease Outbreaks; D004197:Disease Reservoirs; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D005779:Immunodiffusion; D008297:Male; D009500:Neutralization Tests; D010154:Pakistan; D012189:Retrospective Studies; D012899:Smallpox / Q000453:epidemiology / Q000276:immunology*; D012900:Smallpox Vaccine; D014611:Vaccination
chemical_list: D000906:Antibodies; D012900:Smallpox Vaccine