Multiple Choice
Antigenic shift
A) has only been observed in the influenza virus.
B) can result in small changes to the SARS-CoV-2 surface spike proteins but does not result in new variants of the virus.
C) has not yet been observed in the SARS-CoV-2 virus.
D) can limit the duration of immunity conferred by infection and vaccination.
Correct Answer:

Verified
Correct Answer:
Verified
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