NURS 350 Lecture Notes - Lecture 3: Innate Immune System, Passive Immunity, Immunoglobulin G
26 Mar 2016
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Iga f i n d m o r e r e. 1 f i n d m o r e r e. Antigens are foreign substances which, when introduced into the body, are capable of inducing a response by the immune system. The immune system recognizes foreign materials as non-self. These foreign materials can be viruses, bacteria, toxins, parasites etc. The human body is constantly exposed to thousands of infectious agents per day, and in most cases, the immune system can kill or inactivate these agents. In some cases, however, before the immune system can mount a protective response, disease can cause significant morbidity and mortality. An immunizing agent contains disease specific antigens; not the virulent microorganism or toxin. The immune system produces antigen specific cells and antibodies in response to the vaccine. Since the vaccine does not include the microorganism or toxin, the morbidity and mortality associated with the disease does not occur.
