Influenza A unit

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This week you will learn about viruses and how they evolve. One common virus that you have probably encountered at some point is the flu.

Respond to the following in a minimum of 175 words:

Based on the readings this week, flu shots are often recommended to prevent the flu, however, they do not always work. What is the evolutionary reason for this? Does the answer to this still make it worthwhile to consider the flu shot based on scientific data?

Note: This question is not to debate whether one should or should not get the flu shot, it is only to discuss the scientific data/thought surrounding them. Please keep your answers to the scientific principles.

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