According to physioroom (a site that usually seems pretty accurate), Obertan & Haidara are meant to be out until April and I saw them both on the training pics
Cisse, Colo, Tiote, Mbemba, Mbabu & Krul are all injured and werent on the training pics so it's just those two as far as I'm aware. Townsend and Dummett have a return date of around now so they might have started doing some work