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What are the pros and cons of passive immunity?

It can provide critical support to an individual in need, such as someone who has been bitten by a snake.

The transferred antibodies start working quickly, often within mere hours.
Passive immunity can override a deficient immune system, making it useful when an individual doesn’t respond to immunisation.

The cons include:

Antibodies are not easy or inexpensive to produce regardless of the source (be it another human, an animal, or created in a lab).

In some cases, antibodies from an animal can cause a severe reaction in the recipient.

Artificial passive immunity is short-lived and restricted to the time the antibodies are in circulation.

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