Should have completed your residency in emergency med, but you were just SO eager to explore the wasteland as a courier, now what's it gotten you? Patients you can't diagnose and a bullet in the head.
LOL.
But seriously, if you can't interact with them at all, it seems like a bug. Try doing stuff like exiting/reentering the room, or waiting a couple hours (maybe even sleeping on one of the empty beds). Worst comes to worst, try disabling/enabling the patients in the console (if on PC).