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 (an infectious disease of birds and mammals) pandemics.
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 (an infectious disease of birds and mammals) pandemics.