Malnutrition affects first and foremost children under the age of two, but young children less than five years of age, adolescents, pregnant or lactating mothers, the elderly and the chronically ill (including those with HIV/AIDS and TB) are also vulnerable. Children are especially susceptible to growth failure when foods have to be introduced to complement breastfeeding in the first and second years of life. Wasting and other forms of acute malnutrition often appear among children in seasonal cycles, especially during the "hunger gap" period between harvests.

"When children suffer from acute malnutrition, their immune systems are so impaired that the risks of mortality are greatly increased. A banal children's disease such as a respiratory infection or gastro-enteritis can very quickly led to complications in a malnourished child and the risks of death are high."

— Dr. Susan Shepherd, MSF Medical Coordinator for the nutritional program in Maradi, Niger。

(MSF via China.org.cn December 2, 2008)