eli5: What happens when you get a blood transfusion with the wrong/incompatible blood type?

Question

eli5: What happens when you get a blood transfusion with the wrong/incompatible blood type?

In: Biology

Answer 1

Your immune system treats the blood as foreign matters and try to kill it off. You will go into shock, cardiac arrest and die if not treated in time, and might still die even if treated in time.