As people get older, the immune system often becomes less effective. Populations of T cells shrink, and the remaining cells may respond more slowly to germs. That slowdown can leave older adults more vulnerable to many kinds of infections.
To…

As people get older, the immune system often becomes less effective. Populations of T cells shrink, and the remaining cells may respond more slowly to germs. That slowdown can leave older adults more vulnerable to many kinds of infections.
To…