A mass tort is a civil action involving numerous plaintiffs against one or a few corporate defendants. The tort may involve, for example, personal injuries suffered by numerous plaintiffs as a result of a defective product, or a mass disaster in which there were many injured persons, such as an airplane crash, or exposure of a large group of people to toxic chemicals or pharmaceuticals.
Mason is a city in southwestern Warren County, Ohio, United States. As of the 2000 census, Mason's population was 22,016. It was the fastest-growing and most populous city in the county and is part of the Greater Cincinnati MSA. Until February 1997, it was part of Deerfield Township.