Date	Event	Description
14 April 2022	New search has been performed	The author team updated the date of search to 17 February 2021, and included all new studies identified. Changes to methods in this review update version are outlined in the 'Differences between protocol and review' section.
14 April 2022	New citation required and conclusions have changed	The results for chest X‐ray and ultrasound have changed.
10 March 2021	New citation required and conclusions have changed	The results for chest X‐ray and ultrasound have changed.
9 February 2021	New search has been performed	This is a 'living' systematic review'; searches are run and screened every few months. The last search date was 30 September 2020. Results of all new studies identified have been incorporated. The conclusions of this Cochrane Review are therefore considered up to date.
23 October 2020	New search has been performed	This is a 'living' systematic review'; searches are run and screened monthly. The last search date was 22 June 2020. Results of all new studies identified have been incorporated. The conclusions of this Cochrane Review are therefore considered up to date.
23 October 2020	New citation required and conclusions have changed	The results for chest computed tomography (CT) have changed.