Dr. Priya Sampathkumar, a consultant in the Division of Infectious Diseases at Mayo Clinic, said the NBA has been “very generous” in allowing the league to save the samples it collects to reanalyze for further information, like gauging how much immunity the body may develop after fighting off the virus. “We’ll be able to go back and rerun some tests on the samples, and continually get more information,” she said. “So what we have now is a snapshot in time, and they’re also willing to be retested at serial intervals.”