<P> Two American Red Cross nurses demonstrating treatment practices during the influenza pandemic of 1918 . </P> <Li> <P> Albertan farmers wearing masks to protect themselves from the flu . </P> </Li> <P> Albertan farmers wearing masks to protect themselves from the flu . </P> <Li> <P> Policemen wearing masks provided by the American Red Cross in Seattle, 1918 </P> </Li>

Which countries were affected by the spanish flu