The overall conclusion is that the importance of effective taping at the edges of plastic sheeting and effective taping at other points of entry is crucial to reduce the amount of air exchange from the outside regardless of the materials used. One study mentioned indicated that the experiments with direct contact with liquid agents showed a somewhat linear relationship between the thickness of the plastic sheeting and certain liquid agents (the thicker the sheeting, the longer the time for penetration of the liquid but there is no data on aerosols or vapors. "The data shows that at thickness of 10 mil [equivalents: 10 mil = 0.010 inch = 0.254 mm = 254 micron] or greater, the plastic sheeting provided a good barrier for withstanding liquid agent challenges, offering better protection against VX than for H."
But the conclusion drawn by the authors in the light of all the data reviewed points to the effectiveness of plastic sheeting and effective taping regardless of materials as a barrier to air exchange into a safe room.
For measurement conversions, see convertme.com - Distance and Length

Health Issues related to Biological and Chemical Warfare

Diseases like anthrax and smallpox progress too rapidly for our immune system's natural ability to control them. Simply stated, these diseases can kill us before our immune system can rally to defend against them. While many CAM practices do have a place in treating other conditions, especially in relieving symptoms, and in improving one's quality of life, in the case of bioterrorism, there is no CAM practice that has been shown to sufficiently stimulate the immune system to fight these deadly diseases. Nor do any dietary supplements or other CAM products have the potency to eliminate highly lethal microorganisms and toxins, once they have entered our systems." see FTC Cracks down on Marketers of Bogus Bioterrorism Defense Products

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