Multiple Choice
Why are new flu vaccinations required each year?
A) The vaccination does contain enough preservatives to last in the body longer than a year.
B) The flu virus mutates frequently.
C) The flu virus can become latent, meaning it can hide from the immune system within the body, so new vaccinations are important to allow for continuing immunity.
D) The vaccination does not contain enough antigens to create a lasting immune response.
Correct Answer:
Verified
Correct Answer:
Verified
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