If the BMI of a child comes in the range of less than 18.5 kg, then it is considered as underweight.
Undernutrition is a type of malnutrition that occurs when the body does not get enough food which leads to delayed growth, low weight, or wasting.
So we can conclude that If the BMI of a child comes in the range of less than 18.5 kg, then it is considered as underweight.
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