You will likely need to stay in the hospital if: Emergency or more severe symptoms of head injury are present; Skull fracture; There is any bleeding under your skull or in the brain. Outlook (Prognosis). Healing or recovering from a concussion takes time. ...
Scientists concluded that the average human body contains approximately 37.2 trillion cells! Of course, your body will have more or fewer cells than that total, depending upon how your size compares to the average human being, but that's a good starting point for estimating the number of cells in your own body.
There is no question as to where to draw that line. Counting only somatic cells when asking how many body cells they are (body = soma) is not dissing the gut flora or the other bacteria associated with the human body. Regarding your source, it is interesting that they happen to say 100 trillion cells.