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Unformatted text preview: Types of immunity. Immunity may be broadly classified as innate or acquired. Innate immunity is present from birth. It consists of numerous types of nonspecific factors that operate during times of disease. Acquired immunity is derived from activity of the immune system. The term generally refers to antibodies and is subdivided into two parts: active immunity and passive immunity. Active immunity is acquired when the body produces antibodies. The immunity is usually long lasting because the immune system has been stimulated into action. However, it takes several hours to develop. Active immunity can be natural or artificial. Naturally acquired active immunity develops when a person produces antibodies during a bout of illness or on exposure to a microorganism even though disease does not occur. The B-lymphocytes and plasma cells function, and this immunity occurs during the natural scheme of events. and plasma cells function, and this immunity occurs during the natural scheme of events....
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- Fall '07