I think the occurrence of any disease has two aspects of positive and evil, precisely refers to their own resistance, evil refers to the invasion of external evil, when the body’s own resistance to decline, it is easy to get sick. So the prevention of disease also from their own and the external environment, first of all, to strengthen their own resistance, should start from the following points: mental: keep a happy mood, because when people are in a better mood, people’s immunity is stronger, it is not easy to get sick, on the contrary, people are in sadness and grief all day, resistance is reduced, it is easy to get sick. Diet: eat more fresh vegetables, fruits, drink more water, regular diet, do not hunger, meat and vegetables, generally according to the ratio of 1:3, that is, a meat dish, three vegetarian dishes, meat dishes are acidic, vegetarian dishes are alkaline, meat and vegetables, to achieve acid-base balance. Exercise: appropriate exercise to enhance physical fitness, some friends will say I am very busy all day, there is no time to exercise, I suggest that friends who do not drive is not to get off a station or two in advance to increase some physical activity. Life should be regular, do not stay up too late. From the outside environment: keep the air at home fresh, many friends in order to keep warm, doors and windows close, which is not conducive to air circulation, must open the windows regularly, the best time to open the windows is between 10:00 am and 4:00 pm. Home can boil some vinegar, smoke, play a sterilization, purify the air, the specific practice is very simple, is to put some vinegar in the pot, boil in the pot, evaporate into the air. Less to go to densely populated places, especially in the case of physical fatigue, so it is easy to be infected. The discovery of patients such as influenza must be timely diagnosis and treatment, appropriate isolation, these are effective means of prevention.