This is a very complex question, let us break down into bite size chunks.
- Happiness may play a significant quodos
- Genealogy also is a key player
- Lifestyle as we well know has a strong impact, when & what we eat must be considered. Then there is the medicine we take,this can build up resistance to super-bugs. As we stand in 2017, anti-biotics are enemy number one. So when you next see your Doctor, Clinician or Consultant think very carefully about the future consequences & the ensuing correspondence.
- Also see Life, illness & reformations