July 22, 2021
NFL Commissioner Roger Goodell released COVID-related operating principles for the 2021 season in a memo distributed to clubs today.
"Nearly all clubs have vaccinated 100 percent of their Tier 1 and 2 staffs. Clubs have put appropriate protocols in place for the relatively few staff who have not been vaccinated, consistent with the guidance given last April. As of today, more than 75 percent of players are in the process of being vaccinated, and more than half the clubs have vaccination rates greater than 80 percent of their players."
This was 07/22/2021
https://operations.nfl.com/updates/football-ops/2021-covid-related-operating-principles/