A. Focus on psychological factors 1. Pay attention to psychological balance: there is psychological balance to have physiological balance to slow down the aging of the brain and immune system. 2, learn to self-regulate emotions, the correct response to various stimuli: positive life events make immunoglobulin IgA increase, on the contrary, such as the face of exam stress, students of various immune response indicators such as natural killer cell activity and lymphocyte proliferation capacity are reduced. 3, to develop an optimistic, cheerful and tolerant character, to smile often: 100-year-old healthy elderly people have 2 things in common, that is, open-minded, easy-going character and kind-hearted; love of labor and love of sports. 4, to learn to vent: there is joy can dance or sing, there is distress do not smother in the belly, can confide in friends or cry. 5, good interpersonal relationships: good for immune system increase, health and longevity. Studies show that: lonely first-year medical students, separated or divorced women have low natural killer cell activity. 6, moderate interpersonal relationships: the important point in regulating emotions is to control anger, anger is tantamount to suicide and seriously affects immune function. The definition of anger is to torment yourself with the mistakes of others and punish yourself with the mistakes of others. To develop a good personality, less jealousy, less suspicion, less aggressive; more trust, more understanding, more concern; modest and cautious; cheerful and generous; treat people sincerely friendly and forgiving, get courtesy also forgive people. Cultivate good interaction habits, maintain a good mental outlook, pay attention to etiquette, pay attention to interaction skills, to listen more, more appreciation, more patience. Second, a reasonable diet China’s Standing Council on Nutrition on April 10, 1997 adopted the “Dietary Guidelines for Chinese Residents”, the content is: food diversity, cereal-based; eat more vegetables, fruits and potatoes; eat dairy, beans or their products every day; often eat an appropriate amount of fish, poultry, eggs, lean meat, less fatty meat and meat and oil; food and physical activity to balance, to maintain the appropriate weight; eat clean and less salt meals; should be moderate Drink alcohol; eat clean and healthy, not spoiled food. Food should be fine, coarse and fine, not sweet and not salty, less fat rich nutrition. To properly supplement protein, protein can participate in human tissue metabolism, renewal and repair, maintaining health and life activities, is the material basis of immunity, is the composition of antibodies and immunoglobulin IgA, IgM and IgG and complement main components, is the composition of white blood cells, lymphocytes and phagocytes and other major components (content > 90%). Severe deficiencies cause a significant reduction in the number of lymphocytes. To supplement vitamins. Vitamins are a class of low-molecular organic compounds that neither constitute raw materials for tissues nor supply energy, and are needed by the body in very small amounts, but are necessary to maintain life activities, most of which cannot be synthesized in the body and must be supplied by food. Vitamins related to immunity include vitamin A, B complex (B1, B2, B6, B12,), C, D, E, folic acid, calcium pantothenate and niacinamide. A deficiency of any of these can directly or indirectly lead to a decrease in the body’s immunity. Foods rich in VA include cream, egg yolk, cheese, cream and yogurt, carrots, parsley, pumpkin, spinach, tomatoes, apricots and hawthorn. Foods rich in B vitamins include buckwheat, oats, corn, yeast and animal liver and crab and fish. Foods rich in VC include tomatoes, cabbage, cilantro, spinach, green onions, red peppers, citrus, kiwi, etc. Foods rich in VE include vegetable oils (except corn oil) and egg yolks, etc. It is important to supplement trace elements, which are the core elements in enzymes related to immune function. The main trace elements that can improve immunity are zinc, manganese, magnesium, iron, calcium and phosphorus. Foods that can significantly improve immunity include garlic, corn, apricots, tomatoes, white potatoes, tea, kelp, carrots, kiwi, reishi, royal jelly, bitter foods (bitter melon, bitter vegetables, cichlids, etc.) and milk. Third, to develop good habits of life life should be regular, early to bed and early to rise, on time, work and rest, work and rest, to ensure sleep, so that the body’s biological clock works normally, to enhance immunity. To drink more water, drink water can not prevent disease, but help to improve immunity, early recovery. To limit alcohol, drinking alcohol for heart protection is limited to 15-30g/d of alcohol. To quit smoking, smoking 1 times more, 4 times more harmful. To develop the habit of napping, napping time 15-30 minutes, more suitable for the elderly. Fourth, adhere to the scientific and reasonable exercise scientific and reasonable exercise is the intensity of exercise need to make the number of heartbeats to a certain standard, that is (170 – age), exercise mainly for aerobic exercise, including walking, jogging, swimming, climbing steps, cycling, rowing, skating, dancing, playing basketball, tennis, badminton, etc., according to physical fitness to choose the project, step by step, persistent. 3-5 times a week, preferably 1 time a day, 30-60 minutes each time. Do not advocate anaerobic exercise such as weight lifting and sprinting. Walking exercise is the best exercise in the world, the time is best chosen in the evening, rather than in the morning on an empty stomach. Jogging should be preceded by 2-3 minutes of preparatory activities, the distance from near to far (3 km is appropriate), the speed from slow to fast, 120-130 meters per minute, to not feel short of breath, to be able to talk to others as appropriate, should not stop immediately after the end, should be slow walking or stepping in place. Fifth, cultivate a wide range of interests calligraphy, painting, listening to music, planting flowers, etc., to cultivate the body, cultivate sentiment and enhance their immunity. Research has proved that the choice of appropriate music listening, can enhance the body’s immune system. Vovinag says that people who can’t spare time for entertainment will sooner or later be forced to spare time for illness. Sixth, automatic and passive immunity Automatic immunity is the injection of vaccines, vaccines and toxoid into the muscle, so that the body actively produces specific resistance. Immunity appears 2-4 weeks after vaccination, and it takes more than 1-3 immunizations to last (six months – several years). Such as the current influenza vaccination. Passive immunization is the injection of antitoxin, antibacterial serum, gammaglobulin, transfer factor and thymidine, etc. Immunity can be obtained immediately, but the dimension is short and is used for the acute prevention and treatment of certain acute infectious diseases.