First off, the news straight from the source:
Xavier has not released the names of the players or staff involved and, while there is speculation to be found on Twitter, there are no reliable sources confirming anything. Whether there were positive tests or just close contact is also a matter of conjecture.
What isn’t is that the Big East has let Xavier down repeatedly this season. The Musketeers have spent a significant amount of time just sitting and waiting this season while they were healthy and other teams weren’t. During those lost open dates the Big East didn’t move any games or make any arrangements to find Xavier an opponent.