Which factor does NOT contribute to the onset of occupational diseases?

Genetic factors do not directly contribute to the onset of occupational diseases in the same way that environmental or work-related exposure does. Occupational diseases are typically the result of external factors associated with a person's profession, such as prolonged exposure to harmful substances, repeated overexposure to hazardous materials, and specific workplace environmental conditions.

In contrast, genetic factors might influence an individual's susceptibility to certain health conditions, but they are not a direct consequence of occupational exposure. Therefore, while genetics can play a role in overall health, it is not considered a primary factor in the development of diseases specifically linked to workplace practices and environments. This distinction is important for understanding how occupational safety and health standards aim to reduce risks associated with external factors in the workplace.