Yes, Face Masks Work
The World Health Organization is still trying to make up its mind about this (per what appears to be the most recent guidance issued in June 2020): “At the present time, the widespread use of masks by healthy people in…
Category COVID-19
How to Deal with Respirator Exhaust Valves
An objection to the use of industrial-type respirators for protection against COVID-19 (as opposed to, for example, the dusts for which they are designed) is that the user exhales through an exhaust valve that offers little or no protection to…
Face Mask Tighteners and Sealers
Safe resumption of business and other activities are likely to rely on diligent use of face coverings and face masks to prevent contagion. Respirators, when available, are designed to seal over the nose and mouth to prevent leakage. Surgical and…
What You Need to Know About Hydroxychloroquine and Chloroquine
There is a lot of conflicting information on the Internet about the effectiveness of chloroquine and hydroxychloroquine for the treatment of COVID-19. This information includes the successful use of these drugs against “coronaviruses” in the past. The confusion may arise…
Yes, Respirators Stop Submicron Particles
People argue that respirators and face masks are not effective against COVID-19 because the virus is much smaller than the 0.3 micron challenge particles against which respirators are tested. They compare the respirator to “trying to stop mosquitoes with a…