title: Bioterrorism. Smallpox vaccinations: how much protection remains?
authors.forename: J
authors.initials: J
authors.lastname: Cohen
mesh_terms: D000914:Antibodies, Viral / Q000097:blood / Q000276:immunology*; D023482:Bioterrorism; D004196:Disease Outbreaks; D006801:Humans; D007156:Immunologic Memory; D012899:Smallpox / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors; D014611:Vaccination; D014616:Vaccinia virus / Q000276:immunology; D012901:Variola virus / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D012900:Smallpox Vaccine