SUNDAY, Aug. 12, 2018 -- Teen health in developing countries is vastly underfunded, researchers report. : SUNDAY, Aug. 12, 2018 -- Teen health in developing countries is vastly underfunded, researchers report. While teens represent 26 percent of people in developing countries, teen health received just 1.6 percent of global development aid for health between 2003 and 2016, the study found. And very little of that money was directed to serious teen problems such as anemia, depression and injuries, according to the study led by researchers from Harvard Medical School.