All right, all right. Be easier to Instacart you some Doritos, Dan. than type this out on twitter but shame away. Let& #39;s make some wild guesses. Maybe 1x10^-7 Da per particle? Any virologists want to argue that one? I& #39;m not at all confident because there& #39;s so much we don& #39;t know.

Then, as Sam said, you have to remember the difference between infectious particles (which we measure) and total viral mass, which is probably 10-1000 times as large depending on the virus.

Then you need to figure out all the reservoirs. Bats, definitely. Cats, almost certainly. Other animals, who knows? And of course there& #39;s humans especially those who went to Sturges etc.