Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 27 - Viruses - Review Questions - Apply: 7

Answer

C.

Work Step by Step

A., B., and D. are irrelevant for vaccine durability. It is the changeability of the viruses which makes an old vaccine unable to help the immune system recognize a new version.
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