Immunity:- Active & Passive, difference explained!💪🏻

Immunity is the body's ability to resist infections and diseases. It is mainly classified into active immunity and passive immunity based on how the body acquires resistance to pathogens.

Feature Active Immunity Passive Immunity
Definition Immunity developed by the body after exposure to pathogens or through vaccination. Immunity acquired by receiving ready-made antibodies from an external source.
Source Produced by the body’s own immune system. Received from another individual or an external source.
Duration Long-lasting, sometimes lifelong. Short-term, temporary protection.
Time to Develop Takes time to develop as the immune system needs to respond and produce antibodies. Provides immediate protection as antibodies are directly supplied.
Examples - Immunity after recovering from diseases like chickenpox. - Immunity through vaccines (e.g., polio, measles). - Maternal antibodies transferred to a baby through breast milk. - Antibodies received via an injection (e.g., anti-venom for snake bites, monoclonal antibodies).
Key Differences:
Active immunity is developed by the body itself, while passive immunity is received from an external source.
Active immunity takes time to develop but lasts longer, whereas passive immunity acts immediately but is short-lived.
Vaccination is an example of active immunity, whereas newborns receiving antibodies from their mother is an example of passive immunity.
Conclusion
Both types of immunity play a crucial role in protecting the body. Active immunity provides long-term defense, while passive immunity offers quick but temporary protection. Understanding these differences is essential in immunology and disease prevention strategies.

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