And they also bind and they also form a complex. And once they form a complex, these two cells begin to release these special chemicals known as cytokines. And what these cytokines do is they basically induce this T cell, the helper T cell, to begin to clone itself via the process of mitosis. So mitosis of the cell takes place and we form many of these cloned helper T cells. And these clone helper T cells begin to release another group of cytokines. And these cytokines go on.