Colds, also known as upper respiratory tract infections, occur in the fall and winter and are common respiratory tract infections, mostly caused by viruses and, to a lesser extent, bacteria, that can usually be cured spontaneously. Colds include a range of diseases, including viral pharyngitis, laryngitis, bacterial pharyngo-tonsillitis, common cold, herpes pharyngitis, etc. Preventing colds is simple: 1. Exercise. Proper outdoor exercise can improve the body’s ability to withstand cold and immunity, reducing the occurrence of colds. 2, reasonable diet. Reasonable diet helps health and increases resistance to various pathogenic microorganisms. 3, pay attention to rest. Fatigue can cause the body’s immune system to decline and susceptible to colds, to ensure adequate sleep, regular rest and reduce late nights. 4. Avoid getting cold and rain. The body’s resistance to external pathogenic bacteria and immunity are reduced after getting cold and rain. 5, avoid close contact with cold patients, and avoid dirty hands touching the nose, mouth and other parts. 6, pay attention to protection, children and the elderly and frail people need to do a good job of protective measures when the flu epidemic, wear a good mask, avoid public places. 7, flu vaccination, part of the flu caused by the flu, if necessary, can be vaccinated against the flu. The occurrence of the flu is related to the patient’s habits, physique, cold and other factors, the first thing to do is to avoid getting cold, followed by attention to exercise to enhance resistance, while developing good habits and avoiding exertion, etc.