ELI5, how come when you get an organ transplant, there’s a chance your body will reject it and your immune system will kill it. But when you get infected by a new disease, it’s difficult for your immune system to kill the disease.

Question

ELI5, how come when you get an organ transplant, there’s a chance your body will reject it and your immune system will kill it. But when you get infected by a new disease, it’s difficult for your immune system to kill the disease.

In: Biology

Answer 1

It’s the difference between looking out the peephole of your door and deciding not to let a stranger in, vs a group of people quietly breaking in and by the time you discover them they’ve made themselves at home and you need to chase them all out on your own with a broom.