A Central Pollution Control Board-led task force has advised people in Delhi to minimize outdoor exposure for the next three to five days and avoid using private vehicles. <br />''<br />''The advisory comes as the city's air quality slipped into the severe category.<br />''<br />''The national capital today recorded its second highest pollution level this year. <br />''The weather office said, unfavourable meteorological conditions are likely to keep air quality in the severe category for the next couple of days.<br />''<br />''<span style="color: #222222;">The CPCB-led task force held a meeting yesterday in response to the high PM 2.5 levels climbing to the severe plus emergency category. Exposure to PM 2.5 pollutants can lead to diseases, such as cancer, and increases chances of stroke</span><br />