How long a bedridden elderly person can live with a lung infection cannot be generalized. The exact survival time is related to the underlying disease, the severity of the lung infection and the treatment measures. In general, the fewer the underlying disease, the better the physical condition, and the less severe the lung infection, the better the patient’s prognosis. When a mild lung infection occurs and the patient’s underlying disease is not serious, if the patient can be actively given comprehensive treatment such as anti-infection and effective treatment, most patients can be cured and will not endanger their lives. However, if the patient’s underlying disease is more serious, poor nutritional status, serious lung infection, etc., and do not get good treatment or poor treatment effect, may cause serious complications, such as respiratory failure, infectious shock, electrolyte disorders, etc., and these complications may lead to the patient’s death. Therefore, bedridden elderly people at home should be sent to the hospital immediately once they have lung infection to avoid further aggravation of their condition.