Vaccines and their role · NCERT Biology

When a person is bitten by a poisonous snake, they are given pre-formed antibodies. This type of immunization is called:

  1. Active immunization
  2. Passive immunization
  3. Natural auto-immunization
  4. Innate immunization
Show answer and explanation

Correct answer: Passive immunization

Passive immunization involves the direct injection of pre-formed antibodies (antitoxins or antivenom) to provide immediate protection. It is used in snake bite cases because the body's own immune response would be too slow to prevent serious harm.

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