The tenuous nature of the 2020 NFL season has been on full display over the past few days as multiple teams around the league were swept up in false positive COVID-19 testing situations.

The known teams to be affected in some capacity, per Albert Breer of Sports Illustrated, are the Chicago Bears, Buffalo Bills, Cleveland Browns, New York Giants and Jets, Detroit Lions, Green Bay Packers, New England Patriots, Pittsburgh Steelers, and Minnesota Vikings.

“We had just started our squad meeting. I was informed of it,” Jets head coach Adam Gase said, via Brian Costello of the New York Post. “Everything happened really fast as far as what was being told to us. Our guys did a great job as far as getting in touch with the league office, following all the right protocols, making sure we were doing all the right things. Our guys, they jumped on it quick, as soon as we found out.”

The stringent nature of tests coming amid the pandemic was sure to cause some chaotic moments, particularly for the NFL, which has more players and staff than any of the other major professional sports that are attempting to play at this point.

There have been key players affected due to the false positives, including Bills quarterback Josh Allen, who was forced to miss practice Sunday.

It’s not likely that this will be the last time that COVID-19 plays a major part of the 2020 football year, although the mobilization of multiple organizations so quickly lends credence to the thought that many are well-equipped via protocols to handle the situations presented.