Why a Second Wave Could Be Even Worse for Sports - WSJ
NFL games in 2020-21 season associated with spikes in COVID cases: research
Officials plead: Don't let Super Bowl become superspreader
NFL reexamining COVID-19 protocols after sudden wave of positive cases late in 2021 season
Study: NFL games in 2020 led to COVID spikes in communities - Los Angeles Times
Research Shows NFL Stadium Openings in 2020 Had No Impact on Local COVID-19 Infections
Column: Sports should require fans be vaxxed - or stay home
Three NFL games moved due to COVID-19 outbreaks
Study suggests NFL crowds may have led to coronavirus spikes
Where each of the 32 NFL teams stands on allowing fans into stadiums - ESPN
Was fan attendance at NFL games during the 2020-21 season associated with subsequent spikes in COVID-19 cases?
With no bubble in place, football season, college and NFL, in jeopardy with rising COVID rates
Eagles-Washington postponed due to COVID-19 cases on WFT; game will be played Tuesday
Baseball stadiums are filling up – but an analysis of the NFL's 2020 season holds a warning about COVID-19 case spikes
New Study Finds Covid Spikes After N.F.L. Games With Fans - The New York Times