From his summary:
"When do COVID-19 SSEs happen? Based on the list I’ve assembled, the short answer is: Wherever and whenever people are up in each other’s faces, laughing, shouting, cheering, sobbing, singing, greeting, and praying."
I take this to mean that sporting events in the ways we're used to will be slow to resume. On the other hand, ordinary work should be quicker to resume.
How about education--the theory being people can't go back to work if the schools are not open? That's more difficult.