Let's begin with mechanism number one. So in this case, what happens is when we form when our antibody binds onto the antigen, it basically inactivates that antigen. So let's take a look at the following case. 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.