Multiple Choice
Influenza shows cyclic appearance of extremely virulent strains that may cause widespread infection with high mortality, such as that of 1918, which infected 20% of the world's population and killed more people than World War I. What is this type of infection called?
A) mutagenic
B) endemic
C) epidemic
D) pandemic
E) transgenic
Correct Answer:

Verified
Correct Answer:
Verified
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