Study Reveals Concerns About Masks With Valves And Face Shields
Study Reveals Concerns About Masks With Valves Allowing Spread Of Virus MASKS WITH VALVES – A recent study reveals some concerns about masks with valves being able to spread invisible droplets over a wide area when sneezing/coughing. Due to complaints of not being able to breathe well enough, some people opt to buy KN95 masks … Read more