Antigenic Variation Occurs Almost Yearly with the Influenza _________ Virus

Question

Antigenic variation occurs almost yearly with the influenza _________ virus.
A)A
B)B
C)C
D)D

Accepted Answer

Influenza A is known for its antigenic variation, as it is capable of undergoing genetic reassortment and mutation at a faster rate than influenza B or C viruses. This leads to the emergence of new strains that can cause seasonal epidemics or pandemics.