[Poliomyelitis in Concepcion; epidemiologic study on an outbreak in 1949-1950].
D001699:Biometry; D004196:Disease Outbreaks; D016021:Epidemiologic Studies; D011051:Poliomyelitis / Q000453:epidemiology* / Q000706:statistics & numerical data*
POLIOMYELITIS/epidemiology and statistics
Poliomielitis en Concepción; estudio epidemiológico del brote epidémico estacional ocurrido en 1949-1950.