NFL won't require players, coaches to receive coronavirus vaccines - The Washington Post
2021 NFL COVID-19 protocols, rules: Differences between vaccinated, unvaccinated players - Pride Of Detroit
NFL Teams Taking Extra Precautions Beyond COVID-19 Protocols
Here's how the NFL tackled the spread of COVID-19 among players, staff
Clearing Up The Facts On Our COVID Protocols
N.F.L. Sets Stiff Penalties for the Unvaccinated, Jolting Teams - The New York Times
The NFL has updated its Covid protocols as the virus disrupts game schedules
As COVID cases surge, pro sports leagues reevaluate their safety protocols - WOUB Public Media
Tom Pelissero on X: Here's the full NFL memo, which also says teams must report weekly the number of employees who are vaccinated, as conversations with the NFLPA continue on the thresholds