(1) patients without definite diagnosis of novel coronavirus pneumonia, (2) combined with a end-stage disease with a life expectancy of less than 1 year, (3) intolerance to cardiopulmonary monitoring recorder, (4) regular follow-up is not possible.

(1) patients without definite diagnosis of novel coronavirus pneumonia, (2) combined with a end-stage disease with a life expectancy of less than 1 year, (3) intolerance to cardiopulmonary monitoring recorder, (4) regular follow-up is not possible.