I may have information about this. However, I am reluctant to pass it on.
I would be curious to know how many politicians within Senate, House of Representatives, Presidents, etc. have suffered with cancer and died as a result.
If we knew this, then we could probably come to our own conclusion as to what you may think I am speculating or recalling.
If you're going to serve them, they want you for life.
How would they ensure this to a certain degree as best they could?
Innoculations/vaccinations for diseases which they consider population control for the rest of society.