STUDY of #COVID19 infection risks for commuting via train with an infected individual talking continuously for 26 minutes in a lightly crowded compartment:

- No risk existed during a short metro ride of 2 minutes.
- Overall infection risk was 1.75%.
- Risk for seated passengers was higher than that for standing passengers.
- Over 80% of infections occurred within 1.5 m of the source passenger, and 100% occurred within 2.6 m.

https://www.sciencedirect.com/science/article/abs/pii/S2210670725005670