The afternoon that day,
Rex and the others are currently getting treated in the hospital, especially Rex since the blood energy that he got hit repeatedly by Ana is still lingering inside his body.
The doctor here is only a normal doctor, there are no healers Awakened.
So Rex can only make do with bandages around his body to avoid getting his injuries worsen, but his injuries are still open since the blood energy refused to let the doctor close the injuries using normal stitches.
Before Rex got treated, he already told the Doctor that he will be fine.
Since his regenerative abilities will kick in just a few days, Rex doesn't need to get treated immediately but the doctor insists to do it.
He said that it was an honor to treat him,
Normal humans can die upon getting contact with Supernatural energy.