Every year on November 22 is the snow festival, usually this season in the north, the Central Plains has begun to snow, and the southern region is also autumn wind, autumn rain showers. But this year’s snow came early and big, so that people who stay in the autumn rain, wandering autumn worries feel the winter in advance. This sudden change in the temperature of nature, so that everyone’s body can not adapt, especially some of the emergency ability of weak groups such as the elderly, children, part of the work pressure of the sub-healthy white-collar more prone to infection with the flu virus. This fall and winter influenza A (H1N1) ravaged the world, coupled with the seasonal anomalies, our ability to adapt is a great test, the size of the drugstore fever detoxification drugs such as Banlangen sold out, on the one hand, fully demonstrates the national awareness of disease prevention, on the other hand, also reflects the knowledge of disease prevention needs to be strengthened. So how to prevent the cold? In addition to wearing masks in public places and trying to avoid contact with infected patients, I think the main thing is to improve your immunity and strengthen your adaptability to the environment, you can take some “adaptogen” type of Chinese medicine. The so-called “adaptogens” are drugs that can put the body in a state of “enhanced non-specific defense”. The characteristics of these drugs are: 1. They have a wide range of effects in enhancing the body’s resistance. It can enhance the body’s resistance to harmful stimuli, such as reducing the physical nature of cold, heat, excessive weight or weightlessness, excessive exercise or forced immobility, centrifugal and radiation damage to the body; 2 regulate the pathological process, so that it tends to normalize the role. For example, it can play a regulatory role in the rise of blood sugar caused by overfeeding and the fall of blood sugar caused by underfeeding. Rhodiola rosea is a good plant adaptogen that grows in sandy soil in the alpine zone of Europe and Asia. It has good anti-stress, regulating immune system and endocrine system, and can prevent physical and mental stress, poisoning and cold. Chinese medicine believes that “the righteousness of the internal, the evil can not dry”, only to improve the internal factors to eliminate the interference of external factors. Of course, there are many drugs that belong to the adaptogen, such as ginseng, ginseng and so on. As the saying goes, “medicine is better than food”, the weather is getting colder as we enter the snow season, which is a good season to replenish the yin, the following foods can also help you spend the winter. Lotus root: raw lotus root can clear the heat, produce fluid, quench thirst, cooked lotus root can strengthen the spleen, appetite, benefit blood. Therefore, there is a “summer heat should be raw lotus root, autumn cool should be cooked lotus root, raw food should be fresh and tender, cooked food should be strong old”. Eel: sweet, warm, benefit the blood, liver and kidney, strengthen the muscles and bones, dispel wind and dampness. In the winter diet, such as burned eel, stewed eel, fried eel, eel porridge, etc., are health food. Red dates: red dates have the effect of nourishing Yin and moistening dryness, benefitting the lungs and replenishing Qi, and stewing with silver fungus, lily and yam for better results. Chicken soup: winter is the high season of bronchitis, one of its prevention methods is to drink chicken soup, especially beneficial to children. According to analysis, hen fat has the effect of enhancing bronchial mucous membrane secretion and resolving phlegm. In addition, there is a special substance in chicken that can enhance blood circulation in the pharynx and nasal mucous membrane secretion, which is beneficial for keeping the respiratory tract open, clearing respiratory viruses, relieving cold and nasal congestion and treating dry throat and cough.