With the exception of one canceled game, competitors in the N.C.A.A. basketball tournaments were largely not disrupted by the coronavirus.
But the wider impact of the championships, which welcomed a limited number of in-person spectators, is yet to be seen. If there are implications, they could be hard to detect, infectious disease experts warn.
“The protocols for the athletes and coaches were good and so they probably won’t have a problem with them,” Dr. John Swartzberg, an infectious disease expert and professor emeritus from the University of California, Berkeley, said on Monday. “Having fans in the stands, it’s not a good idea and there could be a problem from that.