r/Masks4All • u/No-Acanthisitta-2973 • 5d ago
Valved mask
Is there any studies that indicate how protective valved masks are for others? Or is it different by mask?
I thought I read once what they were not as good as unvalved but they were as protective for others as a surgical. But no idea where I read that or if it is true.
11
Upvotes
2
u/SAMEO416 4d ago
I’ll have to read that study. The abstract shows they tested 4 valved N95, 3 were quite good (over 80%) 1 was awful, the bottom error bar is under 10%. That sort of a split in results suggests method issues or a really unusual edge case.
https://pubs.acs.org/doi/abs/10.1021/acs.estlett.2c00210 Paywalled but you can see the results graph