However, this does not make any mention of masks, or their potential role in cultivating bacteria that could lead to serious illness. It just concludes that bacteria were the killers, not the "spanish flu".
Edit: reusing masks is a bad idea precisely because of the pathogenic buildup, but people do it all the time.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2599911/
The published Fauci paper
However, this does not make any mention of masks, or their potential role in cultivating bacteria that could lead to serious illness. It just concludes that bacteria were the killers, not the "spanish flu".
Edit: reusing masks is a bad idea precisely because of the pathogenic buildup, but people do it all the time.