Simulation Exercises To Strengthen Polio Outbreak Preparedness in The Horn of Africa: Experiences and Lessons Learnt.

Background: Poliovirus importations and related outbreaks occurred in the Horn of Africa (HoA) following an initial outbreak, which started in Somalia, spread into Kenya within ten days and later into Ethiopia and gradually to other countries in the region. National preparedness plans for responding to poliovirus introduction were insufficient in many countries of the Region. We describe a series of polio outbreak simulation exercises that were implemented to formally test polio outbreak preparedness plans in the HoA countries, as a step to interrupting further transmission.

Methods: The Polio Outbreak Simulation Exercises (POSEs) were designed and implemented. The results were evaluated and recommendations made. The roles of outbreak simulation exercises in maintaining regional polio-free status were assessed. In addition, we performed a comprehensive review of the national plans of all for seven countries in the HoA Region.

Results: Seven simulation exercises, delivered between 2016 and 2017 revealed that participating countries were generally prepared for poliovirus introduction, but the level of preparedness needed improvement. The areas in particular need of strengthening were national preparedness plans, initial response, plans for securing vaccine supply, and communications.

Conclusions: Polio outbreak simulation exercises can be valuable tools to help maintain polio-free status and should be extended to other high-risk countries and subnational areas in the HoA Region and elsewhere. There is also need to standardize the process and methods for conducting POSE for comparability.