Graham's placement on the reserve/COVID-19 list earlier Friday was the result of a positive test, Aaron Wilson of Sportstalk 790 Houston reports.
According to Jason Lieser of the Chicago Sun-Times, Graham is vaccinated, so he'll be eligible to rejoin the Bears as soon as he's asymptomatic and has tested negative on two occasions at least 24 hours apart. Graham won't have sufficient time to gain clearance ahead of Sunday's game against the Buccaneers, which kicks off at 4:25 p.m ET. The Bears are likely to turn to Jesse James as the primary backup at tight end behind starter Cole Kmet.