What is a key benefit of integrating human and animal health data in One Health surveillance?

• A. It enables earlier detection of spillover events by combining signals from multiple species.
• B. It leads to data duplication and confusion.
• C. It restricts data to one sector only.
• D. It eliminates the need for environmental data.

Answer: (A)

Integrating human and animal health data broaden’s the surveillance view so we can spot spillover risks earlier. When a pathogen spills from animals to people, there are often warning signals first in animal populations or in the environment; by bringing together veterinary reports, wildlife and livestock data, and human health data, these signals can converge into a clearer early warning. This cross-species, multi-source view allows investigators to detect unusual clusters or shifts in patterns sooner, trigger rapid investigations, and implement targeted actions to prevent wider transmission. It also reflects One Health in action, removing data silos and enabling a coordinated response across sectors. In contrast, ideas that data integration causes duplication, confines data to one sector, or omits environmental data miss the core benefit of timely, collaborative risk detection.