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Author Question: Yearly vaccination of humans for influenza viruses is necessary because A) of an (Read 1060 times)

futuristic

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on: Sep 10, 2013
Yearly vaccination of humans for influenza viruses is necessary because
A) of an increase in immunodeficiency diseases.
B) flu can generate anaphylactic shock.
C) surviving the flu one year exhausts the immune system to nonresponsiveness the second year.
D) rapid mutation in flu viruses alters the surface proteins in infected host cells.
E) flu leads to autoimmune disorders.


aero

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Reply #1 on: Sep 14, 2013
I remember it was D


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