New Delhi – Defence Research and Development Organisation(DRDO) and Council for Science and Industrial Research(CSIR) has found a solution for efficient conversion of liquid oxygen to low pressure oxygen gas that can be given to Covid-19 patients at their hospital beds.A prototype was made functional at base hospital in Delhi.As per statement, Since oxygen was transported in liquid form in cryogenic tanks, quick conversion of liquid oxygen to oxygen gas and ensuring availability at the Covid-19 patients bed was a critical challenge faced by all hospitals.