Dose-response in One Health risk assessment addresses...

• A. The relationship between exposure dose and probability or severity of adverse health effects.
• B. The total number of diseases in a population.
• C. The economic impact of a response.
• D. The rate of environmental degradation.

Answer: (A)

Dose-response in One Health risk assessment examines how much of a hazard someone is exposed to and how that amount translates into the likelihood of adverse health effects, and, for some endpoints, how severe those effects can be. In One Health, this concept connects humans, animals, and the environment because exposure pathways often cross species and ecosystems, so understanding how increasing exposure changes risk helps predict impacts across different hosts and settings. The curve describing dose versus response captures the idea that at low exposures there may be little or no harm, while higher exposures increase the probability of illness or the severity of outcomes, with various shapes (linear, sigmoidal, threshold) depending on the hazard and endpoint. This focus is distinct from simply counting how many diseases exist, assessing economic costs, or measuring environmental degradation, which address different aspects of risk and impact.