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Point Mutations in the Hemagglutination (HA)or Neuraminidase (NA)genes During Viral

Question 14

Multiple Choice

Point mutations in the hemagglutination (HA) or neuraminidase (NA) genes during viral ribonucleoprotein (RNP) replication give rise to new strains.This mechanism is known as the antigenic:


A) drift.
B) shift.
C) re-assortment.
D) modification.

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