You can properly enhance your resistance through diet and drugs, and eat more brightly colored vegetables and fruits, such as bananas, grapes, pitaya, passion fruit, cherries and apples. Secondly, you can also choose day lily, mushroom, Flammulina velutipes, white radish, carrot, broccoli, cabbage, milk, soybean milk, eggs, beef, duck and fish. In addition, you can eat more nuts, such as walnuts, peanuts, sesame seeds, pistachios, pine nuts, macadamia nuts and so on.

In addition, you can also take Chinese patent medicines that enhance immunity, such as Jinshuibao Capsule, Buzhong Yiqi Granule, Yupingfeng Granule, and American ginseng buccal tablets. Frequent colds may be caused by decreased resistance, malnutrition, immunodeficiency or some chronic diseases. You can eat Yupingfeng granules, compound glue paste, or inject immunoglobulin and flu vaccine. Pay attention to exercise, enhance immunity and actively treat chronic diseases, such as chronic tonsillitis, chronic bronchitis with nephrotic syndrome and emphysema. Usually prevent colds, pay attention to work and rest, and the decline in resistance may be due to the lack of trace elements such as iron, calcium and zinc, and timely supplement.