Immunity is defined every bit the body’s mightiness to destroy pathogens or other unusual materials too to foreclose farther cases of certainly infectious diseases. The dissimilar types of immunity or defence forcefulness mechanism: Innate immunity too Adaptive or Acquired Immunity.
Innate immunity is inherited past times the organisms from the parents too protects it from nativity throughout life. It is too known every bit innate or natural or familial or genetic immunity. It is of 2 types external (first trouble of defence) too internal (second trouble of defence). Acquired immunity is too known every bit specific defence forcefulness machinery or 3rd trouble of defence. It is of 2 types: natural or active too artificial or passive. Active immunity is produced past times clonal alternative too expansion. Passive immunity occurs when antibodies produced artificially are injected into a individual to counteract antigens such every bit serpent venom, rabies, tetanus toxin too Salmonella infection.
Active Immunity vs Passive Immunity
Active Immunity
1. It is produced due to contact amongst pathogen or its antigen.
2. Immunity is non immediate. H5N1 fourth dimension lapse occurs for its development.
3. It lasts for sufficiently long period, may live life long.
4. Antibodies are produced past times the trunk inward reply to pathogen or antigen.
5. Side effects are really few.
Passive Immunity
1. It is produced due to antibodies obtained from outside
2. Immunity develops immediately.
3. It lasts for a few days
4. Antibodies are obtained from outside.
5. At times the trunk reacts to the introduction of antisera. It is called serum sickness.
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