What causes antigenic drift to occur?
A) introduction of new genes from other viruses
B) gradual changes in the amino acid sequence of viral proteins
C) gradual changes in the viral genome due to replication errors
D) gradual changes in both the amino acid sequence of viral proteins and the viral genome due to replication errors
Correct Answer:
Verified
Q151: What causes antigenic variation?
A)gene mutation
B)differential gene expression
C)genetic
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A)infected lung macrophages.
B)opsonized
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