Updates for the integrated management of childhood illness (IMCI) - Guideline. As part of its response to the global epidemic of obesity, WHO has issued guidelines to support primary healthcare workers identify and manage children who are overweight or obese. Specifically, all infants and children aged less than 5 years presenting to primary health-care facilities should have both weight and height measured in order to determine their weight-for-height and their nutritional status according to WHO child growth standards. Comparing a child's weight with norms for its length/height is an effective way to assess for both wasting and overweight