Members of the Red Cross Motor Corps, all wearing masks against the further spread of the influenza epidemic, carry a patient on a stretcher into their ambulance, Saint Louis, Missouri, October 1918. (Photo by PhotoQuest/Getty Images)
Members of the Red Cross Motor Corps, all wearing masks against the further spread of the influenza epidemic, carry a patient on a stretcher into their ambulance, Saint Louis, Missouri, October 1918. (Photo by PhotoQuest/Getty Images)