It's fairly common knowledge among long term sufferers of pcs that it's likely they will never make a 100% recovery. 95%? Sure 98% ok. But 100%? Most tend to have some kind of residule effect. Whether this manifests itself as mild headaches when one has pushed too hard, or mild concentration or memory issues years down the road, usually it's the case to various degrees.

Why so many professional medical staff don't know this is anybodies guess.