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The influenza virus contains an RNA genome. Scientists typically need to make a new flu vaccine...

The influenza virus contains an RNA genome. Scientists typically need to make a new flu vaccine every year because

Multiple Choice

  • the common influenza virus can come from many species of animals including cats and dogs.

  • people change their habits each year and become susceptible to different strains of the virus.

  • the virus develops resistance to the vaccine.

  • our bodies develop resistance to the vaccine and it becomes less effective.

  • the virus can mutate into new strains.

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Answer #1

the virus can mutate into new strains.

Flu viruses are constantly changing, the formulation of the flu vaccine is reviewed each year and updated as needed to keep up with changing flu viruses.

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