The herpes simplex virus is a pathogen that can infect people and cause herpes simplex and is an enemy to the body’s immune system. The immune system relies on antigens to identify the enemy, and the herpes simplex virus can produce antigens of the herpes simplex virus, and the body’s immune system will produce an antibody against this antigen, which is called the herpes simplex virus antibody. Because the herpes simplex virus is divided into type 1 and type 2, the antibodies are also divided into type 1 and type 2. In addition, the antibodies in the blood can also be divided into IgM and IgG antibodies, the former appearing earlier and disappearing earlier, while the latter generally appearing a little later, but can continue to appear, so you can check the antibodies to the herpes simplex virus to distinguish whether it is a type 1 or type 2 infection, and also to distinguish whether it is a recent infection or a previous infection.