Smallpox vaccine.
D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012899:Smallpox / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission; D012900:Smallpox Vaccine / Q000008:administration & dosage / Q000009:adverse effects; D016896:Treatment Outcome; D014611:Vaccination / Q000379:methods
D012900:Smallpox Vaccine