How to increase immunity in a child as he is constantly getting sick due to a cold, cough and fever

A. Give a good multivitamin supplement and along with that when you give milk to the child add two teaspoons of dry fruit powder with a pinch of black pepper and turmeric into that you can give it twice in a day is going to be one of the best remedies that I can suggest you to build healthy immunity and avoid junk and sugary foods