Just finished reading this fascinating (and enraging) article in Wired about the bad science behind the WHO and CDC's recommendations on COVID transmission:
https://www.wired.com/story/the-teeny-tiny-scientific-screwup-that-helped-covid-kill/
Made me think back to how when I got my vaccine last week, I spent 45 minutes in line in a poorly-ventilated school hallway sharing air that dozens, maybe even hundreds of people had just been breathing. We all dutifully stood two metres apart, but no doors or windows were open, no HEPA air purifiers were running, nobody was monitoring the level of CO2, and people in line in front of me were talking loudly. It was a superspreader event waiting to happen, and totally avoidable.