whatilearned
Read more: https://www.nationalww2museum.org/war/articles/medical-innovations-1918-flu
TIL During the 1918 flu, the cause was unknown. Scientists thought it was caused by a bacterium and didn’t know whether viruses, which couldn’t be seen yet, were chemicals or microorganisms.
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… and yet they were still better at simply wearing a mask in order to not kill each other than the maga-idiots of today.