Abstract
This is a paper of basic knowledge on respiratory viruses from the references in order to propose a system that prevent influenza virus infection. This paper reviews four points. First point is nature of major respiratory viruses. Second and third points are influences of the viruses on the human body and that on social activities. Fourth point is current measures against influenza and its issues. It's necessary to sterilize respiratory viruses before the viruses invade the respiratory system in order to prevent major outbreak caused by a new type of virus, like the SARS virus, and to achieve complete measures against influenza.
