It has become a common sight in places like Mexico and Japan and at the airports of those countries where swine flu has spread.

While people are going on wearing masks thinking that it would protect them from catching swine flu, its actual effectiveness is not certain. The masks are not fine enough to stop the virus from passing through the barrier of the mask, because the virus is too fine and small to be barricaded properly. This is in case of the virus being present in the very air that the person is breathing.

Otherwise, a mask cuts down on one of the routes of transmission which is direct inoculation of the droplets that a swine flu-sick person releases by sneezing or coughing. But, the mask does not help protect from the actual mode of transmission, touch. By touching a place that the sick person as touched, the virus gets transmitted and when that person touches his eyes or mouth by his hands, the virus enters the body and starts infecting. The mask only prevents the person from constantly touching his face.

In places like airports, a mask can only help prevent the direct inoculation of droplets by sick people, who either sneeze or cough. But, in essentiality, it does not help with swine flu in the airports where the virus might inhabit the air.

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