Policemen in Seattle wearing masks made by the Red Cross, during the influenza epidemic. December 1918.
1918-12
<a href="//commons.wikimedia.org/wiki/File:165-WW-269B-25-police-l.jpg" title="File:165-WW-269B-25-police-l.jpg">File:165-WW-269B-25-police-l.jpg</a>