Multiple Choice
You were sick with the flu last winter. Why then does your doctor suggest you be vaccinated against the flu this year?
A) The virus blocked your immune systemʹs ability to produce memory cells.
B) Surviving the flu one year inhibits the immune system the second year.
C) The virus inactivates helper T cells.
D) Flu viruses mutate rapidly.
Correct Answer:
Verified
Correct Answer:
Verified
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