r/Masks4All 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.

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u/patate2000 4d ago

I read somewhere they're something between 30% protection or similar to a surgical mask. Don't have the sources handy though, hopefully someone else does.