A child’s immunity can be improved by adhering to breastfeeding after birth, adding complementary foods on time, and ensuring that the child lives a regular life. 1. Adhere to breastfeeding after birth: Breast milk contains immunoglobulin, and adhering to breastfeeding can enhance the immunity of the child after birth, which is incomparable to any food including infant formula. Therefore, it is recommended that breastfeeding can be done until the age of 2 or above. 2. Add complementary foods on time: add complementary foods on time, diversify food, have a balanced and reasonable diet, and guide babies not to be partial or picky about what they eat, so as to ensure the demand for nutrients. Adequate nutrition is the material basis for the development of the immune system. 3. Ensure that children live a regular life: ensure that children live a regular life, develop good habits of rest and relaxation, and actively participate in various sports activities for physical exercise. In addition, you can also enhance your child’s immunity to specific diseases through vaccination, and if necessary, consult a doctor and follow medical advice.