I believe (based on a stat I saw somewhere) that masks can protect you by about 17%, which is better than nowt! A good fit is important, which is why I double mask with a KN95; cotton layer on top. But I also have 3M FFP2, which fit very well indeed. By way of example, not a recommendation of this seller:Like me, protecting others. I wear one inside any public building, however empty it might be. Trouble is all the unmasked who are not protecting us. That's making me hesitant about accepting the booster in my circumstances, assuming I ever get offered one. Already overdue now.
I only break those out for very special occasions...
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