This news was just broken by Bob McKenzie:

Yesterday, McKenzie reported that the NHL is about to use a new reporting method for positive tests where they will give a total figure, but will not reveal what teams or players are involved.

Bob McKenzie: NHL and NHLPA are in “unprecedented” levels of negotiation

Not all NHL arenas are even open yet for Phase 2, which is a voluntary training program that involves twice weekly tests and regular symptom monitoring.