Children with low immunity can increase their resistance by supplementing nutrition, increasing outdoor exercise and getting enough sleep. 1. Supplementary nutrition: give children a reasonable combination of nutritious diet, infants try to pure breastfeeding, older children a balanced diet, pay attention to supplement protein, trace elements, vitamins and so on. 2. Exercise: children try to participate in some outdoor exercise, exercise at least half an hour a day, in addition to improving immunity, but also to promote growth and development. 3. Adequate sleep: let the child to ensure adequate sleep, especially quiet, dark sleep environment, can promote the secretion of growth hormone, to ensure energetic, in order to increase resistance. It is not recommended to give your child medication to improve resistance, as the child grows older, the child’s resistance will slowly increase.