The sequelae of coronavirus infection are terrible, especially those caused by severe infection. In case of pulmonary impairment, chronic obstructive pulmonary disease may develop after recovery. In winter or after cold or flu, recurrent episodes of chest tightness may occur, requiring repeated use of ventilators for treatment. After treatment with hormonal drugs, coronavirus pneumonia may result in chronic bone destruction and femoral necrosis, but mild cases of coronavirus pneumonia have no sequelae.