Fighting against infection is necessary for all human beings .This is naturally done by the immune system of the body .It can be categorized into two namely innate immunity and acquired immunity
Innate immunity is present naturally in the body right from the birth.This stops the invasion of microorganisms entering into the body .This is the first line of immune defense. If this fails the disease causing agent enters the inner body . After this the natural immunity like white blood cells in the body reacts and destroys the antigen .The innate immune organs is skin others are tears, enzymes gastric juices, WBC ,etc.,
Adaptive immunity or acquired immunity is produced by the body after the invasion of an antigen and it is destroyed .Here the T cells and the B cells are produced and it destroys the antigen. The antibody which is produced during this time is remembered by this immune system to attack same type of antigen in future and provide immunity.
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