So let's take a look at the following three steps in our procedure to mass produce these specific monoclonal antibodies. So, in step one, what we basically want to do is we want to find an organism with a healthy and functional immune system. So, for example, let's take a mouse. And what we want to do is, since we want to produce a specific type of antibody, what we're going to do is we're going to inject that mouse with an antigen that binds to that antibody that we want to study. And so if we inject the antigen into the bloodstream of that mouse, the immune system of that mouse will begin to produce the plasma cells that produce the antibodies that bind to that antigen. So after time, when this mouse has those plasma cells, following injection, we can basically draw blood, let's say, from the spleen.