Adam Silver revealed the NBA is anticipating more positive COVID-19 cases when teams arrive to the NBA campus this week.

Once teams arrive, all team 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."

Silver also said any significant number of positive tests inside the protected campus could result in a second shut down of the season.

"I think we do have the ability to trace, of course to try to understand where that positive case came from," Silver said of any positive cases inside the Walt Disney World campus. "We can actually analyze the virus itself and try to track whether if there is more than one case, if it's in essence the same virus and same genetic variation of the virus that is passed from one player to another or two people have gotten it on the campus independently. So those are all things that we are looking at."

"Certainly if we had any sort of significant spread within our campus, we would be shut down again."