What about recurrent respiratory infections? This is one of the most frequently asked topics by parents in my practice. In fact, it’s a clichéd question. Respiratory tract infections are one of the most common diseases in children, and they can have an acute onset with fever, runny nose, sneezing and a light cough. Symptoms may also vary by age, including vomiting and diarrhea. Repeated respiratory infections make parents feel annoyed and worried. They often look to medications such as gammaglobulin for prevention. However, the actual effect is very little. Recurrent respiratory infections are closely related to their defenses, environmental health, nutritional status and anatomical features of the pediatric respiratory tract. Infants and young children have no nasal hair, the pharynx is rich in lymphatic cells, easy to swell after infection, and the trachea and bronchial muscles of children are not fully developed, the mucosa is delicate and vascular. Therefore, they are more likely to be infected. Understand these truths, so we should do the following: 1, increase outdoor activities, more sunshine. 2, keep indoor ventilation. (Even in winter) 3, with the weather changes in clothing. (The more you wear in winter, the warmer you are) 4, strengthen nutrition, indeed, the weak use of appropriate body immune drugs.