title: [Letter: The value of smallpox vaccination].
mesh_terms: D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000009:adverse effects; D014944:World Health Organization
chemical_list: D012900:Smallpox Vaccine
vernacular_title: Uber den Wert der Pockenschutzimpfung.