Figure legend:
Figure 1 Differential pulmonary functional recovery from COVID-19 and impaired diffusion function in recovered severe COVID-19 patients. A The percentage of the pulmonary ventilation dysfunction among the three groups,including MMEF%pred < 65%, FEF75%pred < 65% and FEF50%pred < 65%. B The percentage of diffusion dysfunction among the three groups,including DLCO%pred < 80% and DLCO/VA%pred < 80%. C The percentage of the lung volume among the three groups,including TLC%pred <80% and RV%pred <65%,and the value of RV/TLC (actual/pred).