People who live past 110 have an unusual abundance of killer immune cells

People who reach 110 and beyond appear to have unusually large numbers of rare immune cells capable of killing abnormal cells. These CD4 cytotoxic T cells became more common with age and often expanded into large groups of nearly identical cells, suggesting the immune system was repeatedly responding to persistent threats.

from Top Health News -- ScienceDaily https://ift.tt/TlqEbco