Excellent explanation, thanks. That seems to translate well to my layman intuition. Would there actually be a health benefit with respect to cancer (or pathoge

Excellent explanation, thanks. That seems to translate well to my layman intuition. Would there actually be a health benefit with respect to cancer (or pathogenic disease) from this "T cell migration"? Is there a sense in which migration of T cells spread information to different parts of the body or is this just not how it works?