Types of Immunity

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Types of Immunity:

    Natural or Innate Immunity: The natural or innate immunity that enables an individual to resist the disease, to which the particular species is immuned.
e.g. Plant diseases do not affect animals.

    Acquired or Specific Immunity: The resistance against some infectious diseases developed by an individual during lifetime on exposure to the infections is called acquired or specific immunity.
The acquired or specific immunity is of two kinds – active acquired immunity and passive acquired immunity.
Active acquired immunity: This kind of immunity is developed by our body, during the first infection of any pathogen. The antibodies produced in the blood stays for a long period and kills the similar pathogens whenever they enter the body. If the antibody production is stimulated naturally, after recovery from a disease, it is called Natural Active Acquired Immunity.

               If the antibody synthesis is stimulated by application of vaccines or any other man made methods, the immunity gained is called Artificial Active Acquired Immunity.

                       E.g. The polio drops and triple antigen injected into the child in the immunisation programme.

    Passive Acquired Immunity: In this type of immunity, a readymade antibody is introduced from outside instead of stimulating the body to produce antibody with antigenic stimulus.

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