Low immunity can be recovered by correcting bad habits, supplementing nutrition, proper exercise, actively treating the original disease, taking medication and so on. 1. Correct bad habits: long-term late night, mental stress, irregular diet or smoking, alcoholism and other bad habits, will cause endocrine disorders, and cause a decline in immunity. So you need to correct bad habits in time, avoid staying up late, ensure a normal routine, help to restore immunity. 2. Supplementary nutrition: malnutrition can also cause low immunity, but also lead to anemia and other symptoms, it is recommended to eat more high-protein foods, eat more fresh fruits and vegetables, a balanced diet, help nutritional recovery, immunity is also improved. 3. Appropriate exercise: It helps to enhance physical fitness, improve cardiopulmonary function, promote blood circulation and improve immunity. It is recommended to do some aerobic exercise according to your tolerance level. 4. Positive treatment of primary diseases: many diseases can cause a decline in immunity, such as hyperthyroidism, rheumatoid arthritis, systemic lupus erythematosus, diabetes, etc., so we need to actively treat the primary disease, immunity will also be improved accordingly. 5. Take drugs: such as gammaglobulin and thymic peptide, transfer factor, interferon and other immune enhancers. It is recommended to take under the guidance of a doctor. Low immunity should be adjusted from diet, exercise, nutrition, but also active treatment of the primary disease, follow the doctor’s instructions to take drugs.