Photo Courtesy OpenSFHistory
A man in San Francisco poses for a photographing while wearing an wearing influenza mask during the 1918 Spanish Flu Pandemic.
Are masks effective controlling the spread of COVID-19? San Francisco’s response to the 1918 Spanish flu pandemic, when the city government mandated that everyone wear masks, offers some clues.
Read in SF Gate: https://apple.news/Afd8UolPiQsahFup7MQNKTA
