TThe puzzle of the health of some people for 100 years or more may have been solved by scientists.

Tests have shown that super-people's blood contains exceptionally powerful immune cells that attack viruses, bacteria and tumors.

Most people carry a type of cells called CD4 T cells, which act primarily as sentinels, searching for invaders, and then pumping chemicals to attract the "soldier's" immune cells that eliminate the disease.

But a study of seven supercentenarians – all of whom were living up to 110 years or older – revealed that many of their CD4 T cells take up arms themselves against pathogens, which greatly enhances the immune system.

The researchers found that super-people contained many more cells of this type, about 25%, compared to less than 10% for an average person.

Dr. Kosuke Hashimoto, from the Japanese Riken Center for Integrative Medical Sciences (IMS), said, "We were particularly interested in studying this group of people because we consider it to be a good thing." is a good model of healthy aging, which is important. in societies like Japan, where aging is advancing rapidly. "

"If we can find the link between the immune system and aging and longevity, we may be able to help extend the life expectancy in good health."