Respiratory tract infections take different amounts of time to heal depending on the site of infection, urgency and chronicity. In general, acute respiratory tract infections are usually cured in 7 to 15 days after medication, while chronic respiratory tract infections require long-term treatment and prevention. The respiratory tract can be divided into the nose, pharynx, larynx (upper respiratory tract) and trachea, bronchi and branches. Acute upper respiratory tract infections include the common cold, influenza, nasopharyngitis, tonsillitis and laryngitis, etc. 70% to 80% of these infections are caused by viruses, while the other 20% to 30% are caused by bacteria and can be directly infected or secondary to a viral infection. After general treatment (rest, drink more water, pay attention to warmth) and symptomatic treatment (cough, phlegm, antispasmodic asthma) treatment can be cured generally 7 to 15 days. Chronic respiratory infections are mainly chronic bronchitis, generally can not be cured, need long-term treatment and prevention to improve the body’s immune function. Should strengthen personal protection, usually strengthen physical exercise to enhance physical fitness, symptoms of obvious discomfort should be timely to the hospital.