On the positive side, Brendan Gallagher and Sami Niku have been released from the National Hockey League's COVID-19 protocol. However, they will resume training sessions with the team starting tomorrow.
The Habs practiced this afternoon, following their loss to the Pittsburgh Penguins, and due to the absence of Chris Wideman (who's wife is expecting a baby), Joel Armia was moved to defense. He formed the 4th pair with Corey Schuneman.
In short, with Armia on the 4th defensive pair, which is only used in practice, it probably shows that he will be left out on Thursday against the Philadelphia Flyers.