Fig. 2From: Lung ultrasound score predicts outcomes in patients with acute respiratory failure secondary to COVID-19 treated with non-invasive respiratory support: a prospective cohort studyPatients allocation to non-invasive respiratory support. ARF: Acute Respiratory Failure; COVID-19: Coronavirus disease 19; HFNC: High-Flow Nasal Cannula; CPAP: Continuous Positive Airway Pressure; LUS: Lung UltrasoundBack to article page