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Author Question: Secondary immune responses upon a second exposure to a pathogen are due to the a (Read 758 times)

futuristic

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on: Sep 10, 2013
Secondary immune responses upon a second exposure to a pathogen are due to the activation of
A) memory cells.
B) macrophages.
C) stem cells.
D) B cells.
E) T cells.


aero

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


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