There have been no cases of reinfection in patients with novel coronavirus pneumonia, which may leave some sequelae. Although reinfection is possible in patients who have recovered, there have been no such cases. Patients with mild disease generally have no sequelae, and those with severe disease may be partially affected. In severely ill patients, there may be residual changes in the repair of lung damage, such as pulmonary fibrosis, within a short period of time. However, as evidenced by clinical experience and performance, the repair capacity of the lung is generally strong and the vast majority of pulmonary fibrosis can be repaired, but for more acute and critically ill patients, a certain amount of pulmonary fibrotic tissue may be left behind for a relatively long period of time. It is recommended to strengthen the follow-up work at the later stage. Cured patients should strengthen protection against colds and other infections, and strengthen rehabilitation activity training, etc. Initially, you can do appropriate activities at home and increase the amount of exercise for rehabilitation. Content source: Dr. You Lai