The Face Mask FAQ


Part 1: Main face mask FAQs

Part 2: More face mask FAQs

Part 3: The strange and deplorable case of the Gesundheit-II machine 

Part 4: The influential UK face mask reviews 

Part 5: A look at the face mask literature – written, going up soon

Appendix A: A short guide to the units of measurement 


If you are pressed for time, just read Part 1.


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