Patients admitted to a COVID Emergency Department less than 24 hours due to COVID-19-like symptoms Patients previously tested positive for COVID-19 at out-of-hospital test sites, hospital-driven drive-in testing sites, via a general practitioner etc., but with no previous hospital contact or admission due to COVID-19 are eligible for inclusion. Age ≥18 years. Positive COVID-19 PCR from oro- or nasopharyngeal swab or a tracheal suction fluid sample.

Patients admitted to a COVID Emergency Department less than 24 hours due to COVID-19-like symptoms Patients previously tested positive for COVID-19 at out-of-hospital test sites, hospital-driven drive-in testing sites, via a general practitioner etc., but with no previous hospital contact or admission due to COVID-19 are eligible for inclusion. Age ≥18 years. Positive COVID-19 PCR from oro- or nasopharyngeal swab or a tracheal suction fluid sample.