We still don’t know how the immune system works. But we are learning some interesting things about it. First, we find out that fasting for 3 days causes the body to do an immune system re-set. And we learn that injections of embryonic stem cells stops and reverses damage caused by certain immune system disorders, like MS. Errr … at least in mice.
Why do these things happen? We don’t know. But they appear to happen. Interesting.