Methods
This review is based on previously published manuscripts that were identified through a MEDLINE search (2020 and 2021) of English-language literature. The literature search was limited to clinical journals with accessible full texts, and the key phrases used were ‘bronchoalveolar lavage and COVID-19’. Pediatric cases were excluded. A total of 430 manuscripts were reviewed, but only a select number were chosen at the discretion of the authors. The literature search and the authors’ clinical experiences were used to draft the manuscript and to give practical suggestions.