Inclusion Criteria:

1. Provide informed consent before participation in the study.
2. Aged ≥18 years
3. Hospital admission with symptoms suggestive of COVID-19 infection
4. Ten days or less since the onset of symptoms
5. Virological confirmation of SARS-CoV2 infection by reverse transcriptase PCR (RT- PCR) according to Center for Disease Control and Prevention (CDC) guidelines within the previous 72 hours
6. Subjects showing bilateral pulmonary infiltrates on chest imaging
7. Saturation of oxygen (SpO2) by pulse oximetry <94% on room air at sea level
8. did not list

Could it be inclusion criteria #6 above slowing things down? It is my understanding that the Omnicron variant does not attack the lungs. Perhaps someone on the board with medical expertise could comment.

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