So we see that natural killer cells seek out and destroy infected cells that have been infected by, let's say, some type of virus and they also kill off cancer cells. Now, what about B lymphocytes and T lymphocytes? Let's begin with B lymphocytes. B lymphocytes are those cells of our antibody mediated response system of our adaptive required immune system. So these B lymphocytes are essentially responsible for creating antibodies, these proteins that essentially travel inside our blood system and which help play an important role in actually protecting us from infection. So belymphasize, our cells that are part of the antibody mediator response system they further differentiate into plasma cells as well as memory cells.