The physical extent of the disease suggests that his is a rather severe form of the disease. The
recoveryRecovery position - series rate in the absence of complications is high, 90 to 95%, but the recovery time may be quite prolonged. That he has survived the early stage of the disease, is young and otherwise in good health is very much in his favor.
Any judgment of prognosis, in an individual case, is best made by the doctor(s) most intimately involved in his care; those familiar with his course, the occurrence of complications and his response to therapy. We suggest that you ask one, of the more sympathetic relatives, to pose your questions to your friend's primary physician.