Types of immunity - Typesofimmunity..Innateimmunityis...

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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. 
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