A key characteristic of pandemic influenzas is that they:
A. Occur in a single wave, then recede quickly
B. Have the ability to mutate rapidly
C. Are not spread through human-to-human contact
D. Spread slowly throughout specific populations
A key characteristic of pandemic influenzas is that they:
A. Occur in a single wave, then recede quickly
B. Have the ability to mutate rapidly
C. Are not spread through human-to-human contact
D. Spread slowly throughout specific populations
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