shortage of medical oxygen. "Requirement for Medical Oxygen is a critical component in the treatment of Covid affected patients," the Centre said."In view of the recent surge of Covid-19 cases, the requirement of oxygen for effective clinical treatment of Covid patients has also witnessed a manifold hike," the government said.In a letter to all Chief Secretaries, Union Home Secretary Ajay Bhalla has asked them to take all measures to prohibit the supply of oxygen for industrial purposes, except those exempted.Union Home Secretary Ajay Bhalla writes to all Chief Secretaries asking them to take all measures to prohibit supply of oxygen for industrial purposes, except those exempted.