You might wish to fix yer post above there. You are quoting SLE, with text from my post. So it appears SLE posted that text. It confuses the reader.
fwiw, one can look up the average diameter of a corona virus and the mesh gap of high thread count (by electron microscope). A double layer provides significant protection against intrusion, likely reducing viral load. Even if the intention is to prevent spread to others.
re: "Like other experts, he agrees that poorly ventilated indoor sites are the prime spreading ground for SARS-CoV-2. " WTF ? Just mandate large circulation fans for any restaurants and bars that want to remain open. My gym (open) already has dozens of circulation fans. No member has reported being positive for the past 6 weeks.
LOL fine dining to the roar of fans while napkins, menus, and anything else not nailed down go flying in the wind. Just a bit different atmosphere than a gym. Anyway mandates are ignored left, right and center. That is one of the problems.
I heard one guy today state he will start wearing a mask when the overweight lazy at risk start taking responsibility for their own health, putting down the cigarettes, chocolate butterfingers and getting out for an hour of exercise.
As I notice the deluge of Nutrisystem weight loss advertisements, it's become apparent the obesity epidemic in the USA has just gotten much worse since the pandemic started.