This is hilariously late. One of the B strains (yamagata) is essentially extinct. There's only B Victoria circulating. For Influenza A, this would be amazing.

This is hilariously late. One of the B strains (yamagata) is essentially extinct. There's only B Victoria circulating. For Influenza A, this would be amazing. Currently the vaccine composition is 3 (H1,H3, Bvic) or 4 valent. This could reduce the total composition down to 2 (flu A + flu B). But influenza A has 20+ dub types for the HA alone.