title: Spotty defense. Big cities are late to vaccinate against smallpox.
authors.forename: Mark
authors.initials: M
authors.lastname: Alpert
mesh_terms: D023482:Bioterrorism; D006801:Humans; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine; D014504:Urban Health; D014611:Vaccination
chemical_list: D012900:Smallpox Vaccine