How we treat our immune system will give us the appropriate feedback. Abuse of antibiotics, lack of sleep, depressed emotions, etc. will reduce immunity, while maintaining some good habits will protect immunity. 1, balanced nutrition is the basis. Modern life is fast-paced, middle-aged people not only to enrich knowledge not to be eliminated, but also to work desperately to support the family, full of a hungry meal life is always destroying their bodies. Only to achieve a balanced nutrition, such as a seemingly simple egg, a glass of milk, some green leafy vegetables and fruits, may ensure that you can generate sufficient immune cells and molecules. 2, optimism is nutrients. Mental tension, depression, pessimism and other emotions will affect the secretion of hormones, which in turn affects the immune system. Learn to cope with the pressure at any time, as far as possible to maintain an optimistic and positive attitude, make friends and confide in more, to release unnecessary pressure. 3, the regularity of life is to ensure. Studies have found that compared to people who sleep seven or eight hours a night, those who sleep only four hours a night have 50% less antibodies to fight off the flu, and irregular diet and lack of necessary exercise can also make rabbits suffer.