The Air Quality Index (AQI) remains severe to hazardous in Delhi NCR which is a leading cause of the rise in respiratory and chest infection cases in hospitals. According to Dr Sudhir Gupta, senior consultant, Chest physician and Bronchoscopist medicine, Kailash Hospital, Noida, Patients suffering from respiratory diseases are definitely increased, since few days patients are doubled in numbers and burden has also increased in OPDs, some are coming up with infected cough which isnt curable after taking normal medication. The situation has become difficult for those patients who are already suffering from respiratory diseases.