All the following criteria must be fulfilled: - Aged 18 years or above AND - Confirmed SARS-CoV-2 (COVID-19) requiring hospitalisation AND - Use of one of the following: Invasive mechanical ventilation OR Non-invasive ventilation or continuous use of continuous positive airway pressure (CPAP) OR Oxygen supplementation with an oxygen flow of at least 10 L/min independent of delivery system

All the following criteria must be fulfilled: - Aged 18 years or above AND - Confirmed SARS-CoV-2 (COVID-19) requiring hospitalisation AND - Use of one of the following: Invasive mechanical ventilation OR Non-invasive ventilation or continuous use of continuous positive airway pressure (CPAP) OR Oxygen supplementation with an oxygen flow of at least 10 L/min independent of delivery system