The Broncos moved Anderson (undisclosed) from injured reserve to the reserve/COVID-19 list Wednesday, Aric DiLalla of the Broncos' official site reports.
Anderson missed several weeks due to knee and ankle injuries but was designated to return from IR last week. However, he'll now be away from the team entirely following his placement on the COVID-19 list. It's not yet clear whether he's tested positive for the virus or whether he'll be available Sunday against the Chargers.