Almost one third of children in less-developed countries have malnutrition. A report published by the United Nations Children's Fund reveals new differences in prevalence rates of malnutrition, with almost half of all children in south Asia being malnourished, compared with less than one third in sub-Saharan Africa. Yet, food production and availability per head are about the same in sub-Saharan Africa, illustrating the weakness of the argument that malnutrition is caused by lack of food alone.