[Vaccination against poliomyelistis in Denmark in the years 1955 and 1956].
D035843:Biomedical Research; D006801:Humans; D011051:Poliomyelitis / Q000517:prevention & control*
POLIOMYELITIS/prevention and control
Die Schutzimpfung in Dänemark gegen Poliomyelitis 1955 und 1956.