Negative phase is seen in ________ immunity?
Correct answer: A. Active
- A. Active
- B. Passive
- C. Herd
- D. Local
Explanation
The negative phase is classically described in active immunisation, when pre-existing antibody may temporarily fall or neutralise the injected antigen before the person's own antibody response develops. Passive immunity supplies ready-made antibody and does not typically show this immunisation pattern.
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