The NBA league office is addressing concerns about players who have recovered from COVID-19 but continue to test positive for the virus, according to a league memo obtained by ESPN's Malika Andres.

Teams have been concerned about false positive tests possibly sidelining healthy players.

The NBA has had two players test positive for COVID-19 after entering the bubble.

The league has now included the antibody test as part of its protocol for players and staff returning from the virus.

At least one player who contracted COVID-19, recovered and subsequently was cleared to travel to the bubble registered multiple negative tests but later tested positive.