[How "Spanish flu" is not recognized].
Colombo
Carlo
C
Universitätsspital Zürich, Klinik fur Infektionskrankheiten & Spitalhygiene. carlo.colombo@usz.ch
D004196:Disease Outbreaks; D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000266:history / Q000517:prevention & control; D012008:Recurrence