There is no single food that can significantly improve immunity, and a balanced diet can be used to maintain immunity. If children want to improve their immunity, they can take dietary modification and medication. 1. Dietary modification, if the child has malnutrition, usually can eat some nutritious food, such as carrots, apples, kiwi, eggs, milk, etc., can meet the body’s nutritional needs, enhance the body’s immunity. 2. medication, if the primary immunodeficiency disease, such as no gammaglobulinemia, you can follow the doctor’s instructions to be intravenous gammaglobulin. Repeated respiratory tract infections can be treated with bacterial lysis products and other medications as prescribed by the doctor. Usually need to take the child to do more physical exercise, pay more attention to rest, can enhance the child’s body resistance.