1. tracheostomy 2. therapy with high flow nasal cannula 3. any clinical contraindications, as judged by the attending physician 4. patients enrolled in another interventional study 5. hospitalized and confirmed diagnosis of covid-19 for more than 72 hours 6. previous intubation for covid-19 7. patient not committed to full support (dnr, dni or cmo) 8. patient requiring oxygen at home for lung comorbidities 9. primary cause of hopitalization not due to covid-19

1. tracheostomy 2. therapy with high flow nasal cannula 3. any clinical contraindications, as judged by the attending physician 4. patients enrolled in another interventional study 5. hospitalized and confirmed diagnosis of covid-19 for more than 72 hours 6. previous intubation for covid-19 7. patient not committed to full support (dnr, dni or cmo) 8. patient requiring oxygen at home for lung comorbidities 9. primary cause of hopitalization not due to covid-19

tracheostomy therapy with high flow nasal cannula any clinical contraindications, as judged by the attending physician patients enrolled in another interventional study hospitalized and confirmed diagnosis of covid-19 for more than 72 hours previous intubation for covid-19 patient not committed to full support (dnr, dni or cmo) patient requiring oxygen at home for lung comorbidities primary cause of hopitalization not due to covid-19

tracheostomy therapy with high flow nasal cannula any clinical contraindications, as judged by the attending physician patients enrolled in another interventional study hospitalized and confirmed diagnosis of covid-19 for more than 72 hours previous intubation for covid-19 patient not committed to full support (dnr, dni or cmo) patient requiring oxygen at home for lung comorbidities primary cause of hopitalization not due to covid-19

1. tracheostomy 2. therapy with high flow nasal cannula 3. any clinical contraindications, as judged by the attending physician 4. patients enrolled in another interventional study 5. hospitalized and confirmed diagnosis of covid-19 for more than 72 hours 6. previous intubation for covid-19 7. patient not committed to full support (dnr, dni or cmo) 8. patient requiring oxygen at home for lung comorbidities 9. primary cause of hopitalization not due to covid-19

1. tracheostomy 2. therapy with high flow nasal cannula 3. any clinical contraindications, as judged by the attending physician 4. patients enrolled in another interventional study 5. hospitalized and confirmed diagnosis of covid-19 for more than 72 hours 6. previous intubation for covid-19 7. patient not committed to full support (dnr, dni or cmo) 8. patient requiring oxygen at home for lung comorbidities 9. primary cause of hopitalization not due to covid-19