How many lives do humans get ?

When I wrote my last question (which I do not remember), I was just coming out of brain surgery for evacuation of a subdural right parietal hematoma. It was a close call. I almost joined my Dalmatian - the real Spreedog - who died of cancer two years ago. A simple slip and fall stepping out of the shower. This is the second time I was close to death. I know many cancer survivors who have faced possible death and come through it. I do not put myself in their class.