Apparently, according to medicinal science, the removal of the appendix - what had previously been perceived as an evolutionarily redundant appendage - significantly effects the body's immunity. I had mine removed when I was 9. I have a rather rubbish immune system The irony is that the thing that potentially keeps you healthier can burst and nearly kill you.
Yeah, I''m healthy and don't catch everything that comes around. I never take flu shots either. (knock on wood) Now if my joints will just not wear out. They should have never replaced copper water piping.