Budaj didn't accompany the Avalanche on their four-game road trip that begins Tuesday night in Edmonton. There's a chance Budaj could rejoin the team later in the trip if he's cleared by team doctors.
The team said no other players have come down with the virus.
Budaj was scheduled to start his first game of the season last Friday against Carolina, but was scratched due to flu-like symptoms.
Colorado recently brought up goalie Tyler Weiman from the Lake Erie Monsters of the AHL to serve as Craig Anderson's backup.
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