1) she isn't doing it except to virtue signal
2) mask is retaining all the germs right in front of her ugly face and nose, she's constantly breathing them in and out
3) corona viruses are so small, they can pass through everything. Only N95 masks can keep out 95%
4) there are millions of germs in the air, constantly landing on our faces, in our eyes and ears. A virus that travels up the schnaz into the brain can kill you
5) the only remedies are to expose yourselves to what's already out there and gain immunity and eat properly so you have a good immune system.
They are all morans, they've never done any research into this at all.
I got all the above from many posts on QR.