Plum Island is actually located off the northeastern coast of Long Island, New York, not in Connecticut. It is a small island that covers approximately 840 acres and is primarily known for hosting the Plum Island Animal Disease Center (PIADC). The PIADC is a research facility operated by the United States Department of Agriculture (USDA) and has been studying animal diseases since its establishment in 1954.

The main focus of research at Plum Island has been on preventing and controlling foreign animal diseases that could potentially impact livestock, such as foot-and-mouth disease. The facility conducts research, diagnostics, and vaccine development to protect American agriculture from potential outbreaks.

It's worth noting that Plum Island has gained some attention and speculation over the years due to its secretive nature and the nature of its research. However, it's important to separate fact from fiction when discussing Plum Island, as there have been various conspiracy theories surrounding the facility. In recent years, plans have been made to relocate the PIADC to a new facility on the mainland, which will allow for enhanced security measures and modernization of operations.