Why do some children fall ill more frequently than others living in the same locality?

Hint— Due to poor immune system, some children fall ill frequently. Balanced diet and proper nutrition for healthy body is required to have a strong immune system.

Some Children fall ill frequently than others because 

• They are not hygenic.
• They are not having proper healthy food .
• Their food is exposed and it's eaten by other insects or any other organisms.
• Due to poor immune system.
• these are the reasons children fall ill.

Children belonging to poor families do not have adequate and balanced diet , they live in unhygienic environment in cities and, therefore, have poor immune system. These children fall ill frequently than others.

Children fall ill more frquently due to (i) poor personal hygiene, (ii) poor domestic hygiene, (iii) unclean food, (iv) lack of proper nutrition and balanced diet. All these factors make the immune system weak.