The coronavirus most recent testing results for the NFL are pretty remarkable, given the nature of the sport, the number of players on every roster and how easy it is to become infected:
17,519 tests for 2,641 players, one positive
26,991 tests for 5,708 personnel, seven positives
44,510 total tests for 8,349 players and team personnel, eight total positives (.000179 positive rate)
Apparently, when protocols are followed, football can be safely played (or at least so far):
https://twitter.com/NFL345/status/1303394769952010240