If a person could know in advance all his illnesses that may arise during his lifetime, he certainly would do everything possible to somehow warn them.
But unfortunately, no one can know what exactly will get sick the next day or in ten years.
Although there are a number of diseases that can be foreseen, if you live a certain lifestyle. For example, about forty percent of those who smoke sooner or later receive lung cancer, but almost every one of them has problems with teeth and stomach.
But, those who eat a lot of fatty foods, risk getting obesity along with diabetes by many other diseases. Problems with memory and disruption of the brain are obtained by those who love alcohol. But having excluded from your life all these factors, you can remove the likelihood of a huge number of diseases.
Therefore, the choice is always for the person who is the master of his life and an example for his own children. Do not need to show your heirs how their parents themselves gradually kill themselves.