Multi-organ insufficiency syndrome in the elderly is an important cause of death in elderly patients with critical illnesses. The impairment of body functions leads to a decline in body functions, and the body’s ability to resist infections decreases, and geriatric multi-organ insufficiency syndrome is a manifestation of the decline in infection capacity. What is the daily preventive care for declining resistance to infection? 1, sleep time must be enough: sleep quality should be good, because most of the body’s immune proteins are produced during sleep. 2, exercise: in the exercise must pay attention to moderate, continuous and gradual, avoid exercise interval is too long or intensity is too large, remember not to force exercise when overworked, insufficient rest, which will have no effect or immunity not rise but fall. 3, drug health care: many people go to inject immunoglobulin, thymidine (thymidine is a cytokine), play the role of immune enhancement. But these can not be excessive, according to their own situation, selective use. 4, keep emotional stability: people only in a balanced state of immunity is the best, and indiscriminate supplementation or unhealthy psychological state will destroy the long-term stability of the function of the physiological system, so that it is in an imbalance. At this time, even if you eat more and better, the body will not be in the healthiest state.