researchers put cloth face masks under a microscope. the images are out of this world /

Cloth face masks bear become fragment of the daily routine for many of us. The first thing I did at the beginning of the pandemic last year was buy some cloth face masks for my mom,who is 68 years outmoded and has delicate health. Nearly a year after that purchase, my mom is vaccinated, and but she still wears her cloth face mask…Read more...

Source: gizmodo.com