And so these memory B cells swim around and circulate our blood system. Now lymph system and if that same type of pathogen ever reinfects our body these memory b cells as well as memory T cells of the cell mediated immunity can actually recognize these pathogens immediately and begin a very quick and effective response that can ultimately kill off that reinfecting pathogen. So these are the two types of cells that come from our B lymphocyte. But these B lymphocytes must associate with the helper T cells to actually become these two different types of cells. So these two different divisions although they are divisions, they have to work together to actually carry out this process of defending and protecting our body from pathogens. Now, the humoral immunity system is actually very effective against bacterial cells, different types of parasites, fungi, viruses, as well as toxins that enter our tissue of our body.