Yup but just minimal effect I remember. Maybe shave one or two days? I remember reading a discussion a long time ago but I don't remember where I saw it (or what exactly the contents were), but I think it's also linked to the time range shown. But according to the game manual, the effect is the biggest if the doctor is already there before the injury, that's why I always have a level 7 doctor (with taping). Although I think it's overkill.