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https://www.opindia.com/2020/04/iit-roorkee-and-aiims-rishikesh-develop-closed-loop-portable-ventilator-named-as-praan-vayu-for-covid-19-patients/
IIT Roorkee and AIIMS Rishikesh develop closed-loop portable ventilator named as ‘Praan-Vayu’ for COVID-19 patients