When a toxin enters the body, the immune system may recognize it as a foreign invader. The immune response involves the activation of various immune cells, such as T-cells, B-cells, and macrophages. These cells produce antibodies and release cytokines, which are signaling proteins that facilitate communication between cells. In some cases, the immune response can become exaggerated or misdirected, leading to damage to healthy tissues. This process can be influenced by factors such as the chemical structure of the toxin, genetic predispositions, and the dose of exposure.