Table 1

Characteristics of the four countries

Country	Income category	Population in millions	Population under 40 years old	Median age in years	Life expectancy in years	Rural	Unemployment rate	Cumulative confirmed deaths/million people*
Australia	HIC	26	53%	38	84	14%	5.2%	35.21
South Africa	Upper MIC	60	73%	28	64	34%	32.6%	358.67
Egypt	Lower MIC	102	75%	25	72	58%	7.3%	63.78
Nigeria	Lower MIC	213	82%	18	56	48%	33.3%	5.55

*Cumulated deaths per million as of 30 November 2021, COVID-19, OurWorldInData.org.
HIC, high-income country; MIC, middle-income country.