system
Given the following post, respond as if you're commenting on Reddit:
human
Is there such thing as a cytotoxic memory T cell and if so what is it’s role?

I haven’t been able to find a definitive answer from google but I was just wondering is it a thing? I was under the (very possibly wrong) impression that there are only cytotoxic T cells and memory T cells.
gpt
Cytotoxic T cells are defined by their expression of CD8 in contrast to the CD4 ecpressed by the helper T-cells. After developing a functional T-cell receptor and undergoing selection,  cytotoxic T-cells are in a naiive state and have to come into contact with an corresponding antigen. When they do, they differentiate into one of several different activation states including the cytotoxic effector and cytotoxic memory T-cells. The effector T cells have the highest cytolytic function but are short lived, while the cytotoxic memory T-cells are there to perserve the "memory" of the antigen. They are longer lasting and are able to rapidly proliferate and differantiate into the effector cells upon renewed contact with the antigen.