In a virtual interview with Fortune Brainstorm Health, Silver said the NBA expects more positive coronavirus cases to pop up as teams arrive to the NBA campus at Walt Disney World resort this week. But once teams arrive, all personnel will be tested and must quarantine for at least two days. “We won’t be surprised when they first come down to Orlando if we have some additional players test positive,” Silver told Fortune Brainstorm Health. “What would be most concerning is once players enter this campus and then go through our quarantine period, then if they were to test positive or if we were to have any positive tests, we would know we would have an issue.” “… We would know that there’s in essence a hole in our bubble or that our quarantine or our campus is not working in some way,” Silver added later. “So that would be very concerning.”