I tweeted this as a preprint, now accepted. Infectious virus is found in small aerosols (<5 microns) in exhaled breath. More viral RNA is in small aerosols than large. Alpha variant yielded 10-100x more viral RNA in exhaled breath. My note: probably even higher with Delta. /1 https://t.co/i26fOztOs3

— Linsey Marr (@linseymarr) September 15, 2021

And yet many orgs/govs deny this is even happening or possible. Everything is a bigger failure than I ever could’ve imagined in the optimistic 1990s.