The flu mutates at a way faster rate, though. If the current pandemic was caused by an influenza virus, you'd have a whole lot more strains to worry about. We'

The flu mutates at a way faster rate, though. If the current pandemic was caused by an influenza virus, you'd have a whole lot more strains to worry about. We're only seeing 'this many' Covid variants, because right now it has so many hosts to work with. Whether through vaccination or infection, that will change over time however.