title: [A study of children repeatedly negative after smallpox vaccination].
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007114:Immunization; D008297:Male; D012899:Smallpox / Q000517:prevention & control; D012900:Smallpox Vaccine / Q000276:immunology*; D012901:Variola virus / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D012900:Smallpox Vaccine
vernacular_title: Sledování dĕtí opakovanĕ negativních po ockování proti variole.