translation.en: The 20th century saw three large pandemics; the Spanish flu in 1918-19, the Asian flu in 1957-58, and the Hong Kong flu in 1968-69.
translation.sv: Under 1900-talet har vi haft tre stora pandemier: spanska sjukan 1918–19, asiaten 1957–58 och Hongkong-influensan 1968–69.