When you are sick with a virus, your body builds up a defense system by making antibodies against it. Why, then, do we need to get flu shots every year?
W) Antibodies are usually only effective for a few months
X) We need antibiotics to combat the flu
Y) We could be flu carriers even if we are not sick
Z) The flu virus mutates every year
✔️Answer:Z) THE FLU VIRUS MUTATES EVERY YEAR
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