Smallpox vaccine.
Joseph
P R
PR
D004196:Disease Outbreaks / Q000517:prevention & control; D006801:Humans; D012899:Smallpox / Q000517:prevention & control*; D012900:Smallpox Vaccine / Q000600:supply & distribution*; D014481:United States; D014611:Vaccination / Q000379:methods
D012900:Smallpox Vaccine