Why can you still catch colds

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If your immune system has memory cells for every cold virus you've ever had, why can you still catch colds?

A. Viral infections suppress one's immune response.
B. Memory cells don't last very long.
C. Memory cells aren't produced in response to a viral infection.
D. Memory cells only work on bacteria.
E. Cold viruses change so quickly that memory cells from previous colds won't recognize the new versions.

Reference no: EM131353046

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