As the national capital was enveloped in a blanket of thick haze with air quality dropping to hazardous level, people rushed to buy masks to protect themselves, even as doctors remained apprehensive about their efficacy.
Asserting that there is not enough data on the efficacy of masks, AIIMS Director Dr Randeep Guleria said, "Masks are not very helpful as a lot of air can get inside from the sides. Also children and elderly find them very uncomfortable to use."
"Moreover, there is not much evidence about their efficacy," he said, adding the use of nasal filters or air purifiers can provide short-term relief only.
He suggested implementing long-term measures for getting relief for pollution and initiating a movement to protect the environment.
Masks are available in various designs and patterns. Low-priced masks include the ones meant for one-time use, while the high-priced ones are fitted with air filters.
A senior doctor at a private hospital said 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.
Also, one can use masks with sub-micron filters as they do not allow dust particles to reach the lungs, the doctor said.