It is four hours past the deadline for the NCAA to use one of the replacement teams, and ESPN and CBS have nothing on their site saying that someone would be unable to play.
According to CBS Sports, “the NCAA announced Tuesday that five positive COVID-19 cases have been identified out of 2,300 tests conducted so far this week ahead of the NCAA Tournament. Those tested so far include members of team’s traveling parties — not just players and coaches — as well as officials from the NCAA. The positive case count of five is up from zero positives that had been identified as of Monday.”
So, looks like you can safely pick your brackets – will let you know if I read anything different – but really would have expected the news would have happened by now.