Political parties and organisations here are distributing masks among people in view of deteriorating air quality in the national capital even as doctors express doubts over their efficacy.
Following the the high level of air pollution, masks of various designs and patterns are selling like hot cake across the city. Low-priced masks include those for one-time use, while the costlier versions are fitted with air filters.
A senior doctor at a private hospital said that though surgical masks are the most common ones available in the market, they are not that effective, and suggested that one should opt for masks with two valves or vents.
There is not enough data on the efficacy of masks, AIIMS Director Dr Randeep Guleria had said recently.
"There is not much evidence about their efficacy," he had said, adding the use of nasal filters or air purifiers can provide short-term relief only.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)