Action against malnutrition is needed more than ever. An additional US10.3 billion a year is required from public resources to mount a successful attack against undernutrition on a worldwide scale. This would benefit over 360 million children in the 36 countries with the highest burden of undernutrition-home to 90 percent of the stunted children worldwide-and prevent 1.1 million child deaths. Since early childhood offers a special window of opportunity to improve nutrition, the bulk of the investment needs to be targeted between pre-pregnancy until two years of age.Scaling Up Nutrition: What