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.
Sheldon is a city in O'Brien and Sioux Counties in the U.S. state of Iowa, along the Floyd River. The population was 4,914 at the 2000 census; it is the largest city in O'Brien County.