[guns_for_liberty]

“Recommendations to protect against the avian flu indicated that using a face mask with a rating of N99, N100 or P100 in the United States or a rating of FFP3 in Europe should be effective in protecting against transmission.[84] While face masks with these ratings provide 99% or greater efficiency in protecting against flu transmission, N95 or FFP2 face masks provide about 94% efficiency.[85] N95 and FFP2 rated face masks may therefore also be effective.”

wikipedia, swine flu outbreak 2009

[Aliska]

Thanks for finding that. The only sources I can find for the one I mentioned are in Europe or the UK. One has 9x? effectiveness while the other is claimed 99%. And still we don't know what we're dealing with and the size of the micro organism.

Obviously masks could help a lot, but other precautions need to be taken as well.

I wouldn't want to totally depend on either one. But whichever, they may be selling out fast. I haven't decided if I will get some or not. Last year I looked at the better ones at the hardware store, don't know what they were rated, for spraying and opted for the simpler one for what little I did. I don't like spraying pesticides. Or breathing them.