Last time I checked, Janice, no human, in fact, any living thing, has a capacity to live forever. The medical historians can easily cite the average life span of humans going back million of years. Very short. Indeed, the average life span in the mid-19th century was way less than it is now, especially for the industrialized societies. Thanks to modern medicine, and what medical scientists have learned, people with chronic conditions that led to early deaths are now able to enjoy a high quality of life for decades.
Sadly, in spite of all this progress that has improved human longevity, it seems some folks in these industrialized societies have decided that such efforts to help people live better and live longer is an overt conspiracy to enrich the medical doctors, the medical research scientists, the pharmaceutical companies.