Excess deaths from influenza and pneumonia and from important chronic diseases during epidemic periods, 1918-51.
D002908:Chronic Disease; D058872:Epidemics; D006801:Humans; D007251:Influenza, Human / Q000706:statistics & numerical data*; D011014:Pneumonia / Q000706:statistics & numerical data*; D014798:Vital Statistics
INFLUENZA/statistics; PNEUMONIA/statistics; VITAL STATISTICS