1918 San Francisco had an “Anti-Mask League”
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SF had a city wide ordinance to wear masks in public during the Spanish flu.
Around 4/5 folks wore masks.
The “Anti-mask league” thought they were BS and staged mask-less protests.
https://www.influenzaarchive.org/cities/city-sanfrancisco.html#
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And their grandchildren all work for the WHO and CDC.