title: Influenza 1918-1919: a further study in mortality.
mesh_terms: D004196:Disease Outbreaks / Q000266:history*; D005006:Ethnicity / Q000266:history; D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human / Q000266:history* / Q000401:mortality; D014481:United States