As Delhi continues to face a shortage of oxygen to treat the increasing number of patients of the coronavirus disease (Covid-19), deputy chief minister Manish Sisodia urged the Centre on Monday to increase the quota of oxygen. Addressing a press briefing, Sisodia said only the the Centre has the right to decide the quota of oxygen for each state. “There has been a sudden spike in the demand for oxygen in Delhi due to an exponential rise in the number of patients from Delhi as well as from neighbouring states such as Uttar Pradesh, Haryana, Rajasthan among others,” he added.