An antibody is a major component of our immunity system. They are Y-shaped protein cells that are made in the plasma cells. They are called immunoglobulin (Ig). They protect our bodies from pathogens like bacteria, virus, protozoa, and others. The function of these antibodies is to identify pathogens (bacteria and virus) and neutralize them so that the body is not infected by them. When the immune system identifies any intruder in the body (bacteria, virus, chemical), it releases antibodies and neutralizes them. There are different types of antibodies each made for a different type of antigen. An antigen is a kind of intruder in the body that tries to infect the body (See: Antigen). Antibodies are released by the B cells in the immune system. They are glycoproteins. They first neutralize intruders, then glue together with them, and precipitate with them and then latch on to them. This prevents them from spreading and triggers other mechanisms in the body.