And one way that our immune system responds is by using a special type of immune cell known as a plasma cell to basically manufacture and produce antibodies that bind to that specific antigen that the antibody was bound to. So if this is our antigen that the antibody is bound to, then the plasma cells will produce more antibodies that will bind to this specific antigen. Now, oftentimes what happens is let's talk about these plasma cells for a moment. So the thing about plasma cells is any individual plasma cell will only produce a single type of antibody. So we have this one to one correlation between the plasma cell we're talking about and the antibody that it produces. So it only produces a single type of antibody.