Why do organ recipients need to be a match but have to take anti rejection meds for the rest of their lives?

Question

Why do organ recipients need to be a match but have to take anti rejection meds for the rest of their lives?

In: 911

Answer 1

For a organ that is not a match at all, the body goes *”Thats not supposed to be here! GET IT OUT!”*

But if the organ is a match, the body is like *”Thats… not supposed to be here… right?”* and it kind of just keeps looking at it trying to decide if it wants to kick it out.