Lessons in viral spread, courtesy of @elpaisinenglish: “Irrespective of whether safe distances are maintained, if the six people spend four hours together talking loudly, without wearing a face mask in a room with no ventilation, five will become infected”

“If face masks are worn, four people are at risk of infection. Masks alone will not prevent infection if the exposure is prolonged.” https://english.elpais.com/society/2020-10-28/a-room-a-bar-and-a-class-how-the-coronavirus-is-spread-through-the-air.html #covid19

Ventilation people. Who still works or gathers in places with closed windows —> smash them. (Not literally. Just open them)

“The risk of infection drops to below one when the group uses face masks, shortens the length of the gathering by half and ventilates the space used.”