On Monday, Chief Minister Manohar Lal Khattar and Speaker Gian Chand Gupta were also found infected with the virus. Officials said the chief minister, admitted to Gurgaon's Medanta hospital, is in a stable condition.
About 15 Lakh seasonal labourers come from Uttar Pradesh and Bihar to Punjab and Haryana in the procurement season, in the week between end-March and April beginning. This year there is not a single person from these states.
According to the Central Pollution Control Board (CPCB), the national capital's 24-hour average air quality index (AQI) stood at 494 at 4 pm on Sunday, the highest since November 6, 2016 when it was 497.