Introduction Non-invasive ventilation (NIV) delivered by helmet has been used for respiratory support of patients with acute hypoxaemic respiratory failure due to COVID-19 pneumonia. The aim of this study was to compare helmet NIV with usual care versus usual care alone to reduce mortality. Methods and analysis This is a multicentre. pragmatic. https://ncoldbmdfrwj2g.nizarblog.com/35079573/reframing-healthy-food-choices-a-content-analysis-of-australian-healthy-eating-blogs