A WW1 army emergency hospital during the Influenza pandemic of 1918.
Zoom in if you can.
Almost everyone has a mask… uselessly dangling from their necks.
Featured image: “A policeman wearing a flu mask speaks to a maskless man during the Spanish flu pandemic in San Francisco in 1918. California State Library.” From Business Insider article, “Photos show how San Francisco had to convince its ‘mask slackers’ to wear masks after many defied the law while the 1918 Spanish flu pandemic seized the city”