COVID-19 with positive bronchoalveolar lavage fluid but negative nasopharyngeal and oropharyngeal swabs: A case report and insights. Indian J Case Reports [Internet]. 2020 Jul. 25 [cited 2024 Nov. 21];6(6):380-2. Available from: https://mansapublishers.com/index.php/ijcr/article/view/2425