Children can improve their immunity by getting vaccinated, exercising more and paying attention to their dietary structure. 1. Vaccination: When children are young, immunity against viruses, rickettsiae, chlamydia and other pathogens can be achieved through vaccination. 2. Exercise: Children can promote blood circulation and improve immunity through chronic aerobic exercise, such as swimming, jogging and walking. 3. Pay attention to dietary structure: children can drink more water, eat more fruits and vegetables, as well as a balanced diet, regular diet to improve the body’s resistance. It should be noted that when children increase immunity, whether it is exercise, or diet, should be measured, to avoid excessive and aggravate the body’s load, which affects the growth and development of children.