The club announced a small group had tested positive but have now confirmed after more tests they were 'false positives.'
Manchester United have confirmed there are no positive Covid cases within the first team training group after a scare on Thursday.
Players and staff are routinely tested and results on Thursday taken by lateral flow tests showed a small group, which included players and staff, had tested positive for the virus.
That group isolated while they awaited results of a PCR test, but are all now allowed back into the training ground after further testing showed they are negative.