Table 1.

Sociodemographic indicators for the four countries ^a in 2011

Indicators	Cameroon	Kenya	Sudan	Zambia
Population	20,386,799 [8]	41,609,700	30,894,000 [9]	13,046,508 [10]
GDP per capita in PPP terms [11]	1,151	865	1,580	1,469
Expenditure on health (% of GDP) [7]	5.2	4.5	8.4	6.1
Under-five mortality rate (per 1000 live births) [7]	74	108	89	50
HIV prevalence (%) [7]	4.6	6.2	0.4	12.5
Main causes of death	Malaria, HIV/AIDS	HIV/AIDS, malaria, and tuberculosis	Heart diseases, septicemia, respiratory infections, malaria, diarrheal diseases, gastroenteritis [12]	HIV/AIDS, tuberculosis, and malaria [13]

Sources: ref. [14].

GDP, Gross domestic product; PPP, Purchasing power parity; HIV, Human immunodeficiency virus; AIDS, Acquired immunodeficiency syndrome.

^aData are for 2011 or the most recent year available. Countries are given in alphabetical order. Numbers in square brackets give the reference number of the source of the data.