And what happens is, because the virus uses these antigens to actually bind onto the cells of our body, because the antibody actually blocks these antigens, it also blocks and prevents the virus from actually binding onto our healthy cells. And that means the viral agent cannot actually infect our healthy cells. And so this is the process by which once the antibody antigen complex forms, it essentially inactivates that particular pathogen. Now, let's move on to number two. In number two, let's suppose we have some type of cell that was infected by our viral agent. Now, once the cell is infected, that infected cell releases some type of pathogenic antigen and places it onto the MHC class one complex.