Impact Permeation tests assess the resistance of fabrics to the permeation of water by impact. The test was designed to predict the probable rain permeation resistance of a fabric and most procedures still include this language in the scope. The test has also been followed by the medical industry as an assessment of liquid barrier performance for protective apparel and drapes.
Standard mechanisms for antiviral activity need additives that can chemically or dynamically alter some aspects of the virus. Drug strategies depend on distinctly specific binding to the virus (known as receptor-ligand binding) where the receptor is on the virus, and the ligand is the drug used to bind to the receptor obstructing its motive movement.