What can be learned from 1918 flu pandemic
What can be learned from 1918 flu pandemic

It certainly wasn’t during the influenza pandemic of 1918, which lasted from January 1918 to December 1920, and infected one-third of the world’s population, or about 500 million people, leading to about 50 million deaths — about half a million of which were in the United States.
In the 1918 flu pandemic, not wearing a mask was illegal in some parts of America. What changed?
https://edition.cnn.com/2020/04/03/americas/flu-america-1918-masks-intl-hnk/index.html