Why Are Reassorted Influenza Viruses Usually More Likely to Cause

question 25

Multiple Choice

Why are reassorted influenza viruses usually more likely to cause a severe worldwide pandemic?

• A) They are more immunosuppressive than other influenza viruses.
• B) They contain new segments that produce more pathogenic proteins.
• C) They can infect different types of cells.
• D) They have acquired new glycoproteins for which there is no prior immunity.
• E) They have acquired mutations that allow them to evade the immune system.

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