Ever notice how your immune system is like that overprotective bouncer who didn't get the memo about your new friend? The brain and heart are all "I consent" to a transplant, but your immune system is standing there like "NOT ON MY WATCH!" 💪
This is why transplant patients need immunosuppressants - to basically tell that zealous security guard to chill out and accept the new organ. Without them, your immune cells would launch a full-scale rejection party, complete with inflammatory cytokines and antibody confetti.
Your immune system: protecting you from everything... including the life-saving organ you desperately need. Talk about being too good at your job!