I saw photos in newspapers showing people wearing "surgical  masks" at shopping malls, schools, mamak stalls and other public areas. I  have even noticed people wearing them out in the open with no one around.

Because of this, I would like to explain why the mask may do more harm  than good.

The H1N1 virus is not airborne. To be considered an airborne virus, the  microorganism would have to survive or remain in the air for long periods  of time. The H1N1 virus does not stay airborne.

I have noticed many people wearing masks in crowded places. However,  places like airports, shopping malls and schools are full of germs and  bacteria. If a small amount of bacteria gets into a hole in the mask, you  will provide a breeding ground for the bacteria, which may lead to an  illness or infection. The moisture you produce in your mask is perfect for  bacteria and viruses, and may be a recipe for disaster.

The way to prevent exposure to H1N1 virus is to avoid physical contact  with people who may be sick or infected. Also avoid commonly touched  surfaces like escalator railings, poles and public toilet doorknobs.

The H1N1 virus usually spreads when someone touches surfaces with the  bacteria and then touches his own nose, eyes or mouth.

Washing your hands frequently is the best defense against exposure..

And yes, the virus may travel from point A to point B in the air. But it  will drop, not stay airborne.  Wearing a mask is only good at helping you not to spread your illness to others if you are infected.

Source: NST - Letter to Editor on August 7, '09 by Kiang Jau Sang Malacca