Question

A key characteristic of pandemic influenzas is that they:

A. Occur in a single wave, then recede quickly
B. Spread slowly throughout specific populations
C. Are not spread through human-to-human contact
D. Have the ability to mutate rapidly

Answer 1

The correct option is D

Step-by-step explanation:

A key characteristic of pandemic influenzas is that they have the ability to mutate rapidly. When the immunity of human increases the pandemic virus changes.