The NFL has cleared all individuals who tested positive over the weekend for the coronavirus, following what its testing partner called "isolated contamination during test preparation." All of the original test results have been classified as false positives.

Eleven teams were affected by the mistake, with sources telling ESPN that a total of 77 individuals had positive tests, leading to some anxious moments and altered Sunday practice schedules -- but ultimately no evidence of an outbreak. Buffalo Bills quarterback Josh Allen was among those whose initial test resulted in a false positive, forcing him to miss the team's Sunday practice, according to ESPN's Adam Schefter.

According to the sources, the NFL retested the original 77 samples, all of which had been processed at the same BioReference lab in New Jersey. All of the retests came back negative. The league also conducted quicker point-of-care tests on Sunday, and all 77 of those tests were also negative.

According to training camp protocol agreed upon by the NFL and the NFL Players Association, the 77 individuals -- players, coaches, and some staff members -- can resume their normal activities Monday.

BioReference, which the NFL hired to conduct all of its COVID-19 testing, uses five labs around the country to process the league's daily tests. The New Jersey lab was the only one to produce false positives over the weekend.

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