Name | Date | Subtype | People infected (est.) | Deaths worldwide | Case fatality rate | Pandemic Severity Index |
---|---|---|---|---|---|---|
1889–90 flu pandemic[193] | 1889–90 | Likely H3N8 or H2N2 | Unknown | 1 million | 0.15% | Unknown |
Spanish flu[194] | 1918–20 | H1N1 | 33% (500 million)[195] | 20–100 million | 2–3%[196] | 5 |
Asian flu |