Inclusion criteria
To be eligible, a patient must satisfy all these inclusion criteria:
- Age 18 years or older
- Currently admitted to hospital for COVID-19
- Modified ordinal clinical scale 3-5. The modified ordinal scale is shown in Table 1 and is based on the WHO minimal common outcome measure set for COVID-19.[22]
- There is a PCR positive sample for SARS-CoV-2 within the past 21 days. The sample can be a nasal or pharyngeal swab, sputum, tracheal aspirate, bronchoalveolar lavage, or another sample from the patient.