<span style="color: #222222;">Health and Family Welfare Minister Dr. Harsh Vardhan said that scientists at CSIR-National Chemical Laboratory, Pune have designed a portable oxygen unit which can be used in homes, hospitals and remote rural areas.<br />''<br />''In a series of tweets today, he said, one of the strengths of this unit is that it does not require an oxygen cylinder and the use of this unit can help in reducing the demand for ventilators and oxygen cylinders. The Minister said, if the corona patients  get oxygen initially, they do not need ventilators later. He said this can prove to be very important in the Covid-19 pandemic situation.</span><br />