[GeekyBear]

Indeed. If you need to filter out tiny particles from the air you breathe, you can't allow unfiltered air to leak in and out through the sides of the mask.

>Studies that have been done show that if an individual might get infected within 15 minutes in a room, by time and concentration of the virus in the room, add a face cloth covering you only get about five more minutes of protection.

On the other hand if you use the n95 respirators and fit them tight to your face, you can actually spend 25 hours in that same room and still be protected.

https://www.pbs.org/wnet/amanpour-and-company/video/do-masks...

[tehjoker]

There's even speculation that low quality masks create selective pressure for higher binding affinity to ACE2. We should all be wearing N95s...