Early events in an immune response may determine the outcome of immunogenic stimulus, and molecules produced as part of an immune response - such as cytokines and antibodies - can feed back into, suppress or promote the response. Both under- and overreaction to antigens may be deleterious, so the immune system requires control mechanisms at different levels so as to provide an optimal immune response at all times.
Keywords: antigen; immune responsiveness; cytokines; T




