title: FEDERAL SMALLPOX VACCINATION REQUIREMENTS FOR UNITED STATES TRAVELLERS.
mesh_terms: D006801:Humans; D011634:Public Health; D012899:Smallpox; D012900:Smallpox Vaccine; D014481:United States; D014611:Vaccination
chemical_list: D012900:Smallpox Vaccine
keywords: PUBLIC HEALTH; SMALLPOX VACCINE; UNITED STATES