Undernourished child refers to a child who has been supplied with less than the minimum amount of foods essential for sound health and growth. For purposes of R.A. No. 11037, it shall include children who are suffering from chronic hunger and malnutrition as well as those who are considered as wasted, severely wasted or stunted under the World Health Organization Child Growth Standards. (Sec. 3(e), R.A. No. 11037)