Interesting tidbits on Japan. As a whole, still feels like there was something different about the viral strains contagiousness btw Europe and Asia as speculated, however, there’s a part here on japans public transit and how it was not contributing to the spread. How? People don’t really talk on the train and they wear masks.
likely same reason why air travel has NOT been a spreader beyond the moving of people.
https://www.sciencemag.org/news/2020/05/japan-ends-its-covid-19-state-emergency
I remember reading about London’s public health guidelines for a pandemic prior to all this where they mentioned the same about the tube.
Merely standing next to people in a tight space is not what is going to put you at grave risk, it’s when it’s mixed with talking (coughing, sneezing).
So ban phone talking, make that known, and enforce masks and that should be decent protection when the el needs to be used.