Acute upper respiratory tract infections are referred to as “upper respiratory tract infections”, commonly known as “colds”. It is the most common disease in children. It is an infection of the upper respiratory tract, i.e. nose, nasopharynx, throat (including tonsils), caused by viruses and bacteria, and the main pathogen is a virus. How to avoid children from catching a cold? Parents should try to do the following: 1, usually strengthen children’s physical exercise, more outdoor activities, more sunshine, reasonable diet and nutrition. To improve the child’s ability to resist disease. 2, according to the temperature changes in a timely manner to increase or decrease clothing, to avoid getting cold or overheating. 3.Avoid children going to public places where crowds gather and air circulation is not good, such as shopping malls, supermarkets, theaters, etc., especially when the flu is prevalent. Do not take children to hospitals to visit patients, and avoid or reduce contact with the source of infection. When family members or relatives have a cold, they should be properly isolated in time and avoid contact to prevent infection to children. 4. Develop good hygiene habits, wash hands carefully before and after meals and when returning from going out. Not only children, but also family members, teachers and people who have more contact with children should do it. 5. In winter and spring or when air pollution is serious, you should wear a mask when you go out. The mask should be washed and replaced at all times. 6.After a child has a cold, he or she should rest at home and avoid enrolling in daycare to prevent mutual infection among children. 7, every year in late autumn and early winter, give your child the influenza virus vaccination on time for the year. If you can do the above, your baby’s chances of catching a cold will be significantly reduced, making your child grow up healthier.