The organ in which T cells mature, the thymus, atrophies. This reduces your body’s ability to fight infections, especially viral. Generally speaking, your bone marrow where immune cells are made also becomes replaced with fat and becomes less productive. As we age, or cells accumulate oxidative damage that reduces their ability to replenish themselves. There’s a lot of factors that contribute to our immune system weakening as we age, but these are a few of the major ones.
Latest Answers