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Yearly Vaccinations for Influenza Viruses Are Necessary for Humans Because

Question 55

Multiple Choice

Yearly vaccinations for influenza viruses are necessary for humans because ________.


A) of an increase in immunodeficiency diseases
B) the flu can generate anaphylactic shock
C) surviving the flu one year renders the immune system to be nonresponsive the next year
D) rapid mutation in flu viruses alters the surface proteins in infected host cells

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