Wide ranging question, I know. But it's one that crops up in my mind from time to time.
I was born with an extra finger (skin only really, no bone), and a hole in my soft pallett. At 7 years old I had an operation to have that hole sewn up. I had speech therapy afterwards, along with specialist help because I had lack of co-ordination. I was treated at a place called the Wolfgang Center in London (although I think it's since closed down as there's no record of it on Google now!)
I had eczema and asthma in childhood, and whilst the eczema went, the asthma remained.
All these things and more have me wondering from time to time, are some of us pre-disposed to ill-health?