Key influenza-related events since the 1918 influenza pandemic
| 1918 —Influenza A(H1N1) pandemic |
| 1933—Isolation of influenza virus; development of first vaccine |
| 1952—World Health Organization establishes the Global Influenza Surveillance Network |
| 1957—Influenza A(H2N2) pandemic |
| 1968 —Influenza A(H3N2) pandemic; antiviral drugs developed |
| 2009—Influenza A(H1N1) pandemic |
| 2013—First non-egg-based vaccine |
| 2018—Universal vaccine studies |