Your friend says she does not need a flu shot this year because she got one last year. How do you respond? A. You are incorrect because the flu virus grows and develops fast enough that your resistance to previous strains may not protect you against more recent strains.”
B. You are incorrect because the flu virus mutates fast enough that your resistance to previous strains may not protect you against more recent strains.”
C. “You are correct because viruses do not grow and develop, so there is only one strain of the flu virus.”
D. You are correct because viruses do not mutate, so there is only one strain of the flu virus.