asked 217k views
19 votes
Why do doctors recommend that people get a new flu shot every year?.

2 Answers

9 votes
Because the flu virus changes every year
answered
User Knomo Seikei
by
7.9k points
10 votes

Answer:

Because last year's flu shot might not be effective as the new one

answered
User Vishal Tavande
by
8.5k points
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