Faruquzzaman -. Air refiner breather/disinfection unit (water seal system) is a clinically useful and cost-effective device for COVID-19 patients. Mediscope [Internet]. 2022 Oct. 10 [cited 2024 Dec. 4];9(2):81-4. Available from: https://banglajol.info/index.php/MEDISCOPE/article/view/61709