Acute upper respiratory tract infection is a general term for acute inflammation of nasal cavity, pharynx or larynx. The common pathogens are viruses, and a few are bacteria. Generally, the disease is mild, the course of disease is short and the prognosis is good. However, due to the high incidence and infectivity, it not only affects the productive labor force, but also sometimes causes serious complications, which should be actively prevented and treated. The disease can occur all year round, but it is high in winter and spring. It can be spread by droplets containing virus or contaminated hands and utensils, mostly sporadic, but it can be popular when the climate changes suddenly.

About 70% ~ 80% of acute upper respiratory tract infections are caused by viruses. Bacterial infection can occur directly or after virus infection, with hemolytic streptococcus being the most common, followed by Haemophilus influenzae, Streptococcus pneumoniae and Staphylococcus. When cold, rain, fatigue and other inducing factors reduce the local defense function of the whole body or respiratory tract, viruses or bacteria that originally existed in the upper respiratory tract or invaded from the outside can multiply rapidly, causing this disease, especially those who are old and weak or have chronic respiratory diseases such as sinusitis and tonsillitis.

Strengthening the body's own disease resistance is the best way to prevent acute upper respiratory tract infection. For example, regular and appropriate physical exercise and cold water bath can improve the body's ability to prevent diseases and adapt to cold. Do a good job in cold prevention and avoid the cause of illness. Live regularly and avoid overwork, especially at night. Pay attention to the isolation of respiratory patients to prevent cross-infection.