Vaccinia versus poliomyelitis?
D006801:Humans; D011051:Poliomyelitis / Q000209:etiology*; D012899:Smallpox / Q000517:prevention & control*; D014611:Vaccination; D014612:Vaccines; D014615:Vaccinia; D012901:Variola virus
D014612:Vaccines
POLIOMYELITIS/etiology and pathogenesis; SMALLPOX/prevention and control; VACCINES AND VACCINATION