Organs can be donated from patient to patient. However, the patient has to be its own donor when it comes to a hair transplant operation. Since the immune system at an individual's scalp is more likely to reject the stranger's hair follicles and eventually cause an infectious effect. If a patient receives grafts and scalp tissue from another patient, without the usage of heavy immune system-suppressant medications, the patient's scalp would reject the transplant and cause unwanted results in a short period of time.