Which of the following explains why older individuals were not as affected by the 1918 flu virus as younger healthy individuals were?
A) The older generation had been exposed to similar flu viruses before and were able to mount a secondary immune response.
B) The younger generation succumbed to a increased secondary immune response leading to inflammation.
C) The older generation had a healthier innate immune system.
D) A and B
E) A, B, and C
Correct Answer:
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