[Origin of protective vaccination against smallpox in Czechoslovakia].
D035843:Biomedical Research; D003604:Czechoslovakia; D006801:Humans; D012899:Smallpox / Q000517:prevention & control*; D014611:Vaccination; D014612:Vaccines
D014612:Vaccines
SMALLPOX/prevention and control; VACCINES AND VACCINATION
Za6cátky o6ckovánä chráni6cek proti ne6stovicäm u nás.