A room, a bar and a classroom: how the coronavirus is spread through the air

This piece made quite the rounds this week. It is excellent, but there’s a bit of context that is important to keep in mind (that, as usual, has received muss less attention than the original piece). So here goes: The piece illustrates how the coronavirus spreads indoors through aerosols, and how specific safety measures (wearing masks, ventilation) have a large impact. However, as Carl Bergstrom, biologist and author of «Calling Bullshit», notes: It doesn’t show a usual scenario, but a worst-case scenario with a highly infectious person. A lot of patients don’t infect others. So stay wary, but don’t get paranoid.