[Clinical course of pneumonias during the course of influenzal outbreaks in 1957-1958 and 1959].
D001699:Biometry; D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000209:etiology*; D011014:Pneumonia / Q000706:statistics & numerical data*
INFLUENZA/etiology; PNEUMONIA/statistics