Indoor Air Quality - The "Invisible Killer" Under the Roof [Video]

The A/H1N1 influenza epidemic continues to spread around the world, and the situation for prevention and control remains grim. Medical experts have pointed out that this flu is mainly transmitted through droplets, sneezing, and other means. Therefore, enhancing ventilation and keeping indoor air fresh is an important way of preventing the flu. Actually, it's not only the A/H1N1 influenza, many respiratory diseases such as the SARS that we are familiar with are all spreading virus through the air. This can't help but give us a reminder: what is the air quality like in public places? And what kind of health hazards are hidden in it? Let's take a look at the reporter's investigation together.