I find this paragraph very interesting.
If I read it correctly and avoid confirmation bias, it sounds as though wearing a valved N95 can be as or more effective at source control than the current masks & other items worn by the public, all while actually protecting the wearer to a much higher degree.
"Even without mitigation, FFRs with exhalation valves can reduce 0.35-=CE=BCm MMAD particle emissions more consistently than surgical masks, procedure masks, cloth face coverings, or fabric from cotton t-shirts; however, the 0.35-=CE=BCm MMAD particle emissions are not expected to be lower for every model."
So in my opinion, there should be no restrictions against wearing these, such as those being applied by various companies & govt entities. I'll be curious to see if they are lifted, but somehow I an not optimistic.
Confirmation bias creates a strong motive for dismissing information inconsistent with popular opinions.
Ray Cook, MS, CIH 2000-2016
I Cor 1:18
In omnia paratus
Sent from my iPhone
On Dec 12, 2020, at 4:46 AM, John Callen <jbcallen**At_Symbol_Here**gmail.com> wrote: