Both antigenic drift and antigenic shift result in a new strain of viruses.Which statement describes a key difference between antigenic drift and antigenic shift?
A) Antigenic shift takes place gradually,whereas antigenic drift occurs rapidly.
B) Antigenic drift takes place gradually,whereas antigenic shift occurs rapidly.
C) Antigenic drift occurs when the virus replicates.
D) Both antigenic shift and antigenic drift take place gradually.
E) Antigenic drift takes place gradually and occurs when the virus replicates.
Correct Answer:
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