The team is also awaiting confirmation on a second positive test, per Reiss.
According to Tom Pelissero of NFL Network, a player has tested positive, causing the team to conduct meetings virtually.
"We're under the assumption and understanding that the game is going to go off on time," Broncos coach Vic Fangio said Friday, per Michael Giardi of NFL Network. "Anything that happens otherwise will happen when it happens."
The latest news comes after New England reopened the facility Wednesday following a stretch of consecutive days without a positive test. The team had previously seen four different players and staff members test positive over a two-week stretch, leading to the postponement of the Week 5 game against the Broncos.
The facility was closed three different times in a 10-day period.
New England has taken measures to reduce the spread during the week:
Further positive tests ahead of Sunday's game could lead to another postponement, which could create significant issues for the NFL as both Denver and New England effectively used their bye week last week.
Commissioner Roger Goodell has hinted that using a Week 18 could be a possibility to complete the 16-game schedule after multiple postponements.