More than one billion people worldwide are not getting essential health care, according to a report by the Population Reference Bureau (PRB), which calls for international donors to focus more on closing the growing health gap between the world's wealthy nations and its poorest. The 32-page report, 'Improving the Health of the World's Poorest People', finds that per capita health spending in the world's least developed countries, most of them in sub-Saharan Africa and South Asia, comes to only about 11 U.S. dollars a year.