NFL teams cancel training after positive Covid-19 tests

Several NFL teams cancelled or rescheduled training sessions on Sunday after a single laboratory returned a number of positive tests for Covid-19, the league has said.

The Chicago Bears pushed back training from morning to the afternoon. Initial testing had revealed that nine players and staff members had tested positive but the results later turned out to be false positives, and the team put off training until the afternoon "out of an abundance of caution", the Chicago Tribune reported.

The NFL said the clubs were taking precautionary measures while working to either confirm or rule out the positive tests.

"Saturday's daily COVID testing returned several positives tests from each of the clubs serviced by the same laboratory in New Jersey," the league said in a statement.

"We are working with our testing partner, BioReference, to investigate these results.

"Clubs are taking immediate precautionary measures... to include contact tracing, isolation of individuals and temporarily adjusting the schedule, where appropriate. The other laboratories used for NFL testing have not had similar results."