title: Federation witness supports voluntary vaccinations.
mesh_terms: D002487:Centers for Disease Control and Prevention, U.S.; D005104:Expert Testimony; D006282:Health Personnel; D006801:Humans; D032541:Mass Vaccination; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000008:administration & dosage*; D012954:Societies, Hospital; D014481:United States; D035141:Voluntary Programs
chemical_list: D012900:Smallpox Vaccine