👉 Isoimmunity, also known as immune tolerance, is a biological mechanism by which the body's immune system does not react to foreign substances or pathogens. It occurs when an antigen (a substance that causes the immune system to respond) binds to its specific receptor on the surface of a cell and prevents it from binding to other cells in the body. When an immune response is triggered, such as through infection by a virus, bacteria, or parasite, the body's immune system recognizes the antigen as foreign
