One of the following COVID-19 specific; inpatient; postoperative pulmonary complications: Pneumonia; Acute respiratory distress syndrome; Death <br/ >Timepoint: All randomised participants will be followed up until death; discharge from hospital; or 30 days post-randomisation (whichever is sooner). Longer-term follow-up (e.g. 5 years) will be sought as appropriate to each participating countryâ??s settings.

One of the following COVID-19 specific; inpatient; postoperative pulmonary complications: Pneumonia; Acute respiratory distress syndrome; Death <br/ >Timepoint: All randomised participants will be followed up until death; discharge from hospital; or 30 days post-randomisation (whichever is sooner). Longer-term follow-up (e.g. 5 years) will be sought as appropriate to each participating countryâ??s settings.

N/A

N/A

One of the following COVID-19 specific; inpatient; postoperative pulmonary complications: Pneumonia; Acute respiratory distress syndrome; Death <br/ >Timepoint: All randomised participants will be followed up until death; discharge from hospital; or 30 days post-randomisation (whichever is sooner). Longer-term follow-up (e.g. 5 years) will be sought as appropriate to each participating countryâ??s settings.

One of the following COVID-19 specific; inpatient; postoperative pulmonary complications: Pneumonia; Acute respiratory distress syndrome; Death <br/ >Timepoint: All randomised participants will be followed up until death; discharge from hospital; or 30 days post-randomisation (whichever is sooner). Longer-term follow-up (e.g. 5 years) will be sought as appropriate to each participating countryâ??s settings.