Which of the Following Explains Why Immunity to Influenza May

question 15

Multiple Choice

Which of the following explains why immunity to influenza may appear to be relatively short-lived?

• A)Effective immunological memory fails to develop.
• B)Immune responses to influenza involve innate immune mechanisms only.
• C)The primary and secondary immune responses are equivalent.
• D)Influenza virus targets memory cells.
• E)New influenza variants able to escape previous immunity appear regularly.

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