A flu vaccine must be updated annually because the virus undergoes frequent genetic reassortment. This is primarily due to which genomic feature?
Q1. A flu vaccine must be updated annually because the virus undergoes frequent genetic reassortment. This is primarily due to which genomic feature?
Answer: Influenza virus
Explanation: Influenza viruses have segmented RNA genomes allowing for rapid variation. Polio is tempting but it has a single, non-segmented RNA genome.