Applying the One Health principles: a trans-sectoral coordination framework for preventing and responding to Rift Valley fever outbreaks.

Rift Valley fever (RVF) is a good example of a disease for which a One Health approach can significantly improve the management of outbreaks: RVF is a vector- borne zoonotic disease, its dynamics differ between eco-epidemiological patterns and are modulated by eco-climatic factors. Therefore, collaboration between sectors, disciplines and role players, as well as an understanding of the local epidemiology of the disease, are key prerequisites for proper risk assessment and outbreak control. These principles drove the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) to develop an inter-sectoral strategic approach, with specific actions recommended for each of the four periods in the development of the outbreak (forecasting and preparedness, alert, epidemic control, post-epidemic). Through several outbreak response missions between 2006 and 2012 in various countries, an implementation framework was developed by WHO, FAO and the national authorities of affected countries and used to build national response action plans. The framework proposes a structured attribution of duty and responsibilities to committees made up of representatives of the various institutional and operational role players, and with clear mandates and terms of reference (TOR). Such an approach, ensuring real-time sharing of information, coherence in the various aspects of the response, and ownership of the strategy, has proven its efficiency. It could also be used, with appropriate adjustments in the TOR, for other zoonotic diseases.