Why does our body reject other people’s donated organs and require immunosuppressants to be taken but getting someone else’s blood is ok?

Question

Why does our body reject other people’s donated organs and require immunosuppressants to be taken but getting someone else’s blood is ok?

In: 157

Answer 1

Your body can reject blood too if it’s not the right type, fatally so. Beyond that the primary difference is the donated blood isn’t in your body long term, the red blood cells last up to 2 weeks and only make up a portion of your blood. Meanwhile the donor organ is meant to last for years so your body has a lot longer to reject it.