Face Shields Protecting Nobody

While it is true that face shields initially block the projection of spit sprays, molecules containing the virus may skirt under the shield and into the nostrils and airways. When compared to masks with a valve and standard masks, standard masks out performed all three in minimizing the spread of droplets as it catches them within the fabric material.

Sometimes Occam’s Razor is the best, and the cheapest and easiest mask to obtain functions best.