Influenza A virus is an enveloped virus with a lipid-bilayer membrane and three types of integral membrane proteins, namely hemagglutinin (HA), neuraminidase (NA) and M2. Beneath the lipid membrane is a protein matrix made of protein M1. A segmented genome, comprised of eight single-stranded RNAs packed into ribonucleoprotein (RNP) complexes, resides inside the virus....