Covid-19 NewsN95 masks with valves ‘not good’ at filtering droplets during coronavirus pandemicNovember 10, 2020
Covid-19 NewsCovid Warning: Up to 70 percent of Chinese-made KN95 masks don’t meet health standardsOctober 6, 2020
Covid-19 NewsCoronavirus particles stopped by most homemade face masks, even when sneezingOctober 3, 2020
Covid-19 NewsCoronavirus weakening? Viral loads carried by patients on the decline, along with death rateSeptember 27, 2020
Covid-19 NewsFace shields, masks with valves won’t stop spread of coronavirus, study showsSeptember 2, 2020