Common lung infections usually take 1 to 2 weeks to fully recover. Special types of lung infections take longer. Common lung infections such as Streptococcus pneumoniae, Haemophilus influenzae, and respiratory viruses can improve clinical symptoms in 72 hours and fully recover in 1 to 2 weeks after prompt initial treatment with antibiotics and antiviral drugs. In the case of special types of pathogen infections such as fungal infections, antifungal drugs are required, and the course of treatment needs to be greater than 16 weeks for the organism to fully recover. In the case of infection with Mycobacterium tuberculosis of the lungs, a combination of antituberculosis drugs is required at this time, with a course of 6 to 9 months, and in the case of multidrug-resistant tuberculosis, intensive treatment is required for 9 to 12 months, with a total course of at least 2 years. Suspected lung infection, should actively seek medical examination, clear diagnosis, timely treatment. The medication should be prescribed by the doctor.