According to this article, 5 Elks players tested positive on Sunday, followed by 4 more on Monday. That's in addition to the three that tested positive prior to the season.
https://edmontonjournal.com/sports/f...est-of-the-cfl
As for re-scheduling, I'm not sure how they'll be able to do it without (i) moving multiple games, or (ii) giving one team two extremely short weeks between games. I don't think the latter is feasible due to player safety, and the former will be problematic if (when?) an outbreak occurs and another game needs to be re-scheduled.
My guess is that they will kick the can to later in the season -- in the event additional games need to be re-scheduled, or perhaps Edmonton will be out of the playoffs by then such that a loss by default won't matter in the standings.