Cold is a general term for rhinitis and acute inflammation of the throat. In a narrow sense, upper respiratory tract infection is also called common cold. It is the most common acute respiratory infectious disease with a high incidence, which can heal itself in about ten days. The common pathogens of upper respiratory tract infections are 70% to 80% viruses, and bacterial infections account for 20% to 30%. Bacterial infections can be directly infected or secondary to viral infections. The typical symptoms are mainly nasopharyngeal mucositis, including cough, runny nose, sneezing, nasal congestion and other symptoms. If the patient has yellow sputum, it is necessary to consider whether there is secondary bacterial infection. Blood analysis is recommended, and if necessary, sputum pathogenic culture is feasible.
