The 1918 flu (a subtype of H1N1 from 191820), Asian flu (a subtype of H2N2 rom 195758), and Hong Kong flu (a subtype of H3N2 from 196869) are some of the major modern influenza pandemics.
Major modern influenza pandemics H1N1 191820 H2N2 195758 H3N2 196869 
