The popular professor, who left Harvard in 2002 after a dispute with its president, says he may leave again if the university does not grant him tenure.
Many universities instituted new testing protocols, hoping to avoid the problems of the fall. But coronavirus variants and uncooperative students have already driven outbreaks.
Virginia Commonwealth University said it had suspended its Delta Chi chapter after Adam Oakes, 19, was found dead at an off-campus party where he was reportedly blindfolded and given alcohol.