Analysis of COVID-19 superspread events (linkpost)
FYI, an analysis of COVID-19 superspread events is posted here. I just found it online; I was not involved with it. Short version: The major mode of transmission (in such events, YMMV) seems to be ballistic projection of dropules while coughing, singing, or speaking loudly. Masks are recommended. Religious activities,...
I've always referred to that as the Law of Large Numbers. If there are enough chances, everything possible will happen. For example, it would be very surprising if I won the lottery, but not surprising if someone I don't know won the lottery.