New Delhi, Dec. 14 -- As Delhi recorded an AQI above 450 on Sunday, Doctors in the national capital sounded alarms on how young people are coming in with increasing respiratory problems, and advised people to stay "at home to the extent possible."

Dr GC Khilnani, Chairman of the PSRI Institute of Pulmonary, Critical Care & Sleep Medicine, advised people to wear N95 or N99 masks when going outside to help block pollutants.

"I see two types of patients, the young people who do not have any illness or respiratory illness, asthma, or bronchitis. They are coming with a very troubling cough, sore throat, running nose. When I examine them, I don't find anything... A test called fractional exhaled nitric oxide is done, which actually indicates ...