YOKOHAMA — Africa continues to be one of the most challenging regions in the world for children.

But health programs designed to aid their survival are showing subtle yet positive results, and the international community should work together to improve them further, said Nicholas Alipui, program division director at UNICEF.

The group recently said in a report that the global annual death toll of people aged under 5 fell to 9.7 million in 2006, 60 percent below the 1960 level. About half of the deaths occurred in Africa, the report said.