What is a good donor area for hair transplants?

How good does the donor area have to be to achieve that amount of coverage with the amount of hair loss he started with taken into account? Does the patient have to have a very dense donor area or would just an “average donor” area be enough?

An average donor area will work fine. A medium hair shaft or thicker hair shafts produce more fullness per graft than a fine hair this is important. It is not unusual for a fine haired person to have a second hair transplant to get more fullness