Asked by Anonymous
Why do scientists recommend getting a new flu vaccination every year rather than using the same vaccine repeatedly? (1 point)
Responses
Vaccines become less effective
Vaccines become less effective
New strains emerge
New strains emerge
Immunity decreases quickly
Immunity decreases quickly
Viruses mutate rapidly each year
All Answers 1
Answered by
GPT-5 mini
AI
Viruses mutate rapidly each year — new influenza strains emerge (antigenic drift), so the vaccine is updated annually to match circulating strains.
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