(1) Comply with the diagnostic criteria for general type COVID-19 in the Diagnosis and Treatment Program for COVID-19 (trial version 6th), (2) Patients =18 years of age with tracheal intubation, (3) Agree to participate in the trial, and the patient, the legal guardian or the person in charge of the medical institution signed the informed consent through paper signature, electronic signature of mobile phone software, or voice authorization.

(1) Comply with the diagnostic criteria for general type COVID-19 in the Diagnosis and Treatment Program for COVID-19 (trial version 6th), (2) Patients =18 years of age with tracheal intubation, (3) Agree to participate in the trial, and the patient, the legal guardian or the person in charge of the medical institution signed the informed consent through paper signature, electronic signature of mobile phone software, or voice authorization.