Let's suppose we have a virus that basically infects our body. So the virus is swimming around in our tissue. Now, our antibodies, which are specific to the antigens found on this virus, when they locate the virus, they will bind onto those antigens. 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.