The influenza virus contains an RNA genome.Scientists typically need to make a new flu vaccine every year because
A) our bodies develop resistance to the vaccine and it becomes less effective.
B) the virus develops resistance to the vaccine.
C) the virus can mutate into new strains.
D) people change their habits each year and become susceptible to different strains of the virus.
E) the common influenza virus can come from many species of animals including cats and dogs.

Question

Quizplus · Accepted Answer

Viruses tend to mutate much more quickly than living cells, so new versions of viruses are always appearing.

The Influenza Virus Contains an RNA Genome