my son is 5 and half years old always he frequently fall sick what best I can do he eats all kinds of fruits and every thing but why he fall sick

A. give immunity booster food substance like-Eggs, youghrt, spinach, nuts like almond, wallnut, sunflower seeds, apple, and all seasonal fruits and vegetables and , oats, garlic, carrot, broccoli, butter, beans , mint juice, milk and milk products.. Maintain proper Hygine and educated your kid for hand washing. also keep him well hydrate.