As new, more transmissible variants of the coronavirus spread, experts say it’s time to consider using a medical-grade respirator, or wearing a surgical and cloth mask together. Scientists have agreed for some time the main way the virus is spread…
As new, more transmissible variants of the coronavirus spread, experts say it’s time to consider using a medical-grade respirator, or wearing a surgical and cloth mask together. Scientists have agreed for some time the main way the virus is spread…