Individuals who were cigarette smokers at the time of study or were involved in retail or large-scale cigarette sales, responsible for monitoring and controlling part of the production, distribution, or import of cigarettes in Iran were included
About 31 percent smoke compared to about 21 percent of the general population, according to the U.S
That reasonable numbers have survived in China and Hong Kong attest to the fondness with which people regarded them and their ability to endure as a symbol of China's prosperity during the early part of the twentieth century
The good news is the worst kind of fire that a mask can do little to protect against is radiation fires, such as those involving nuclear materials, which may require specialized protective equipment beyond masks to defend against
Like portable models, they contain high-efficiency particulate air (HEPA) filters, capable of filtering extremely small particles from the air