What happens in your body if you are exposed to a virus for which you have been vaccinated?
A. The altered virus recognizes the natural version of the virus and
destroys it.

B. Because the vaccination remains in your body, the altered virus outcompetes the natural version and you do not get sick.

C. The nonspecific immune response recognizes the invading virus and prevents it from entering the body.

D. Memory cells that develop in response to the vaccine recognize
the invading virus and respond quickly to destroy it.