Biology Immunity PMDC Conceptual Practice
PMDC Verified Question 41 of 99
Immediate protection against acute biological threats (such as tetanus toxin or rabies virus) is obtained through:
A
Active immunity
B
Passive immunity
C
Subunit vaccination
D
Natural active exposure
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Passive immunity
Concept: Onset speed of active vs. passive immunity.

Solution: Passive immunity delivers instant protection because pre-formed antibodies immediately bind and neutralize the target pathogen or toxin.

Why other options are incorrect:
  • Option A, Option C & Option D: Active mechanisms require a lag phase of several days to weeks to expand antigen-specific cell clones and generate sufficient antibody titers.

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