The average weight for a little boy of 7 years is 24kg. Your nephew's weight is below the lowest line on the normal growth chart.Nido alone will not help him now.He needs to be examined by a doctor to see why his weight is so low. He may have TB or worms or some other illness to explain his poor weight. You have not given me his 7 year old sister's weight which is also probably very low. I agree with you that your sister's children's weights are very worrying indeed.
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