Manchester United forward Mason Greenwood tested positive for the virus before the 4-1 defeat to Watford at the weekend. With a 10-day isolation period required, his inclusion in the squad for the game against Chelsea is in doubt.
Luke Shaw was absent for the win over Villarreal yesterday due to concussion protocols. He suffered a second blow to the head at Vicarage Road, following a previous head injury in the Manchester derby. There is a possibility that he will return for the trip to Stamford Bridge.
Edinson Cavani is working hard on his recovery from a tendon injury, but the Uruguayan striker only has an outside chance of being involved for the Chelsea match.
Raphael Varane is out until early December with a hamstring injury so the Frenchman has already been ruled out for the weekend, while Paul Pogba is not expected to be back from a thigh problem until the New Year.