The main function of white blood cells is to protect the body from foreign invaders and prevent infection by synthesizing antibodies. They are produced in the bone marrow. There are different types of white blood cells, all with a specific job: Neutrophils, Lymphocytes, Monocytes, Eosinophils, and Basophils.
It was said that a few red dwarfs which were created after the big bang are still existing and is hypothesized to continue to live for years approximately 26