A newborn gains antibodies from its mother through breast milk. This is an example of:
Answer and explanation
Correct answer: D. Natural passive immunity
- Step 1: The antibodies were made in the mother, not in the baby: passive.
- Step 2: They come by a natural route (milk or across the placenta), so it is natural passive immunity; protection fades without memory cells.
Answer
natural passive immunity.
Why not the others: Active immunity requires the baby's own immune response; artificial means by injection or vaccine, which is not the case here.
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