In this case, the immune system will elicit a secondary response and it will be different than the primary response because of the presence of these memory B cells and memory T cells. So let's redraw this diagram as shown. So we have first infection taking place and then we have the end of our primary phase, our primary response. And right when our primary response is over, we have the second reinfect, the second infection taking place. So we are reinfected by that same exact pathogen that contains that same exact antigen. Now, because we have those memory B cells in our blood circulating our blood, our lymph and our tissue, we have that specific antibody that can actually bind and destroy that antigen.