Difference between Active and Passive Immunity

Immunity is defined as the body’s ability to destroy pathogens or other foreign materials and to prevent further cases of certain infectious diseases. The different types of immunity or defence mechanism: Innate immunity and Adaptive or Acquired Immunity. Active Immunity vs Passive Immunity Active Immunity 1. It is produced due to contact with pathogen or its antigen. 2. Immunity is not immediate. A time lapse occurs for its development. 3. It lasts for sufficiently long period, may be life long due to immunologic memory 4. Antibodies are produced by the body in response to pathogen or antigen. 5. Side effects are very few. Passive Immunity 1. It is produced due to antibodies obtained from outside 2. Immunity develops immediately. 3. It lasts for a few days, no immunologic memory 4. Antibodies are obtained from outside. 5. At times the body reacts to the introduction of antisera. It is called serum sickness.Watch this video for a complete side by side summary.

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