https://www.livescience.com/face-mask-new-coronavirus.html

A more specialized mask, known as an N95 respirator, can protect against the new coronavirus, also called 2019-nCoV. The respirator is thicker than a surgical mask, but Schaffner doesn't recommend it for public use, at least not at this point.

That's because, in part, it's challenging to put these masks on and wear them for long periods of time, he said.

Specialists receive retraining annually on how to properly fit these respirators around the nose, cheeks and chin, ensuring that wearers don't breathe around the edges of the respirator. "When you do that, it turns out that the work of breathing, since you're going through a very thick material, is harder. You have to work to breathe in and out. It's a bit claustrophobic. It can get moist and hot in there," Schaffner said.

"I know that I can wear them when I need to for about a half-hour," he added. "But then I have to go out of the isolation room, take it off and take some deep breaths, kind of cool off, before I can go back in."

a este https://www.medrxiv.org/content/10.1101/2020.02.18.20021881v1


N95 je us standard a co som vycitala je to niekde medzi FFP2 (trochu slabsie nez N95) az FFP3 (trochu silnejsie)