Medicine
Hypoxemia
Occult
Coronavirus disease 2019 (COVID-19)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Emergency department
Respiratory distress
Pediatrics
Triage
Oxygen therapy
Oxygen saturation
Internal medicine
Emergency medicine
Disease
Surgery
Infectious disease (medical specialty)
Pathology
Oxygen
Chemistry
Alternative medicine
Organic chemistry
Psychiatry
