title: A prospective study of serum antibody and protection against smallpox.
mesh_terms: D000293:Adolescent; D000906:Antibodies / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D008297:Male; D009500:Neutralization Tests; D010154:Pakistan; D011446:Prospective Studies; D012899:Smallpox / Q000276:immunology*; D012900:Smallpox Vaccine; D014611:Vaccination
chemical_list: D000906:Antibodies; D012900:Smallpox Vaccine