When you are with someone who has a cold, if you want to avoid being infected, you need to strengthen your resistance first, and you need to enhance your physical exercise by doing more jogging or swimming. In addition, you need to eat more fresh fruits and vegetables rich in vitamin C, which can also strengthen your immunity and avoid the transmission of colds. In addition, it is best to wear a mask when contacting patients with colds, and if you have a cold, it is also best to wear a mask, which can effectively reduce the transmission of colds. In addition, the timely taking of cold prevention drugs, is also more effective, for example, you can drink in advance of the plate blue root granules, for the prevention of cold effect is also better. Drinking more water to avoid dryness in the respiratory tract can reduce viral infections and reduce the occurrence of colds. Patients who have a cold should be treated in time to reduce the transmission of the cold, such as the use of antiviral drugs, such as Pu Di Lan anti-inflammatory oral liquid, Blue Scutellaria oral liquid, the antiviral effect is better.