Since then, no Hospital Acquired Infections. And - they saved a ton of money by using them instead of N95's.
Not only do they save money, but the respirators are very comfortable. I wear a 3M version myself, and they are so much more comfortable than scratchy FFP3's.
They are also much more protective:
And the HCW's loved them;
I understand if this sounds too good to be true. Here's their website:
At the bottom of that page, is their Respiratory FAQ:
May 21, 2020, the WHO HQ had ALREADY upgraded to better than the finest hospital's air cleaning.
June 9, 2020. @mvankerkhove @DrMikeRyan @Nyka_eh lied to our faces when they explained why they were sooo confident not masking. Not because it was 1 meter away....
"....dairy parlor, either through the mechanical transmission, through the milking process, or because there’s continual cleaning going on in the dairy parlor, there are large droplets...."