Yes, an occupational illness is a special case of illness. As such, it does not meet the definition of an accident, but is still insured under the Swiss Federal Law on Accident Insurance (LAI). An occupational illness exists if it is "caused exclusively or predominantly by harmful substances or certain work in the course of the occupational activity". Furthermore, other illnesses that have been "proven to have been caused exclusively or predominantly by the occupational activity" also constitute occupational illnesses.