Herpes simian virus 1 (HSV-1) is a virus primarily found in non-human primates, particularly in chimpanzees and monkeys. It is closely related to the human herpes simplex virus type 1, which causes cold sores and can lead to more severe conditions in immunocompromised individuals. HSV-1 can be transmitted through direct contact with infected bodily fluids or lesions. In laboratory settings, HSV-1 is studied for its potential implications in vaccine development and viral research. Understanding this virus helps scientists learn more about herpes viruses in general, including their behavior, transmission, and effects on the immune system.