Mild, common type pneumonia caused by respiratory syncytial virus infection takes about 5 to 10 days to clear up, and the treatment time needs to be extended if it develops into severe pneumonia. For mild, common type of respiratory syncytial virus pneumonia, it usually takes about 5 to 10 days to recover after effective treatment. If respiratory syncytial virus infection is detected, active treatment should be carried out in a timely manner. Antiviral drugs, such as ribavirin, can be used clinically to reduce the risk of the patient developing severe pneumonia. Particular attention should be paid to viral pneumonia due to respiratory syncytial virus infection in immunocompromised populations such as children, the elderly, and patients on immunosuppressive drugs. This is because in these special populations, symptoms tend to be more severe and are more likely to progress to severe pneumonia. And severe pneumonia takes longer to treat, usually more than two weeks. Consult a medical professional for advice.