What defines a One Health risk assessment and its main steps?

• A. A systematic process to quantify hazards and exposures; steps include hazard identification, exposure assessment, dose-response, risk characterization, and management.
• B. A qualitative guess about risk based on intuition.
• C. A process that only considers environmental hazards without exposure.
• D. A process focused solely on economic impact.

Answer: (A)

One Health risk assessment is a structured, cross-disciplinary process that quantifies hazards and exposures across humans, animals, and the environment to understand potential health risks. It follows a sequence where hazards are identified, exposure assessment estimates who or what is exposed, to what extent, and through which pathways; dose-response assessment describes how the severity or probability of adverse effects changes with different exposure levels; risk characterization combines hazard, exposure, and dose-response information to estimate overall risk and its uncertainties; and management uses those insights to decide on actions to prevent or reduce risk and to communicate results. This approach emphasizes systematic analysis and data integration across sectors, not just intuition, and it considers how environmental, animal, and human factors interact. It is broader than focusing solely on environmental hazards without exposure, and it goes beyond looking only at economic impact by addressing actual health risks and how to mitigate them.