- Adults (18-64 years)
- General population
- Elderly (≥65 years)
- Outpatient clinic
- SARS-CoV-2
- Post-COVID-19
- Non pharmacological intervention
- Oxygen therapy
Intervention: Oxygen therapy
- Adults (18-64 years)
- General population
- Elderly (≥65 years)
- Outpatient clinic
- SARS-CoV-2
- Post-COVID-19
- Non pharmacological intervention
- Oxygen therapy