Claim: The 1918 flu (a subtype of H1N1 from 1918–20), Asian flu (a subtype of H2N2 rom 1957–58), and Hong Kong flu (a subtype of H3N2 from 1968–69) are some of the major modern influenza pandemics.
Evidence: Major modern influenza pandemics H1N1 1918–20 H2N2 1957–58 H3N2 1968–69