This is an article from Science magazine, primarily focused on how the virus spreads in the air.
Not any studies per se, but observations on what is going on and some history.
Some very interesting stuff, especially the idea of 6 feet of separation being from the 1930's, and perhaps not enough this time.
For a difference in response, they note:
New York State 20 million people, lock down approach, 24,000 deaths
Taiwan 24 million people, coordinated national response, no lockdown, everybody wearing masks....7 deaths.
https://science.sciencemag.org/conte...cience.abc6197
nb: yes, I still wear a mask in public; high risk group.