Is human brain transplant possible?

There has never been a record of human brain transplant as at today. Brain transplant is the total removal of someone's brain and fix it directly to another person. The idea of human brain transplant is still something that has not been achieved in the medical world and there are so many questions about the possibility of human brain transplant.

Human brain transplant may never be possible because the coordinating ability of the brain concerning some functions it does is specified to individuals. For example, the immune system which also has antigens inside it protects human body from bacteria and virus.

The antigens are specified to individuals, so if there is human brain transplant, the immune cells produced by the new brain might see those antigens as foreign bodies and therefore starts attacking them. Another reason is the possibility of connecting human blood vessels to the brain, this will definitely be a great challenge to accomplish.