Lung ultrasound in the COVID-19 pandemic.

Lung ultrasound has been described for over a decade and international protocols exist for its application. It is a controversial area among pulmonologists and has had more uptake with emergency as well as intensive care physicians. We discuss the basics and evidence behind the use of lung ultrasound in respiratory failure, and what role we see it playing in the current 2019 novel coronavirus pandemic. © Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.