Seasonal epidemicity and focus formation in poliomyelitis anterior acuta.
D058872:Epidemics; D006801:Humans; D010507:Periodicity; D011051:Poliomyelitis / Q000453:epidemiology*; D011052:Poliomyelitis, Bulbar; D012621:Seasons
PERIODICITY; POLIOMYELITIS/epidemiology