Table 1.

Estimated mortality and infection rates of the Influenza pandemics since the past century

Event	1918–1920	1957–1958	1968–1970	2009–2010
Deaths (% of global population)	1.0—5.7	0.03 – 0.05	0.02 – 0.03	0.001 – 0.004
Infections (% of global population)	28	42—55	30 – 57	24
Reproduction number	1.80	1.65	1.80	1.46

Source: World Bank (2020); Biggerstaff et al. (2014).