OMS Global Pandemic Simulation Exercise Reveals Key Insights from 26 Nations

The World Health Organization (WHO) has concluded a major global simulation exercise designed to test international preparedness for a large-scale disease outbreak. Known as Exercise Polaris II, the two-day event brought together 26 countries and territories, 600 health emergency experts, and over 25 partner organizations to simulate responses to a fictional bacterial pandemic.

Global Cooperation Tested in High-Stakes Simulation

The exercise, held on April 22 and 23, 2026, centered on a hypothetical scenario involving the rapid spread of a previously unknown bacterium. Participants activated their national emergency coordination structures, shared real-time information, aligned policies, and mobilized their health workforces under conditions mirroring an actual crisis. The simulation aimed to evaluate the effectiveness of global health emergency frameworks and identify areas for improvement in pandemic preparedness.

Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, emphasized the importance of international collaboration in addressing health emergencies. “Exercise Polaris II showed what is possible when we act together,” he stated. “It demonstrated that global cooperation is not optional—it is essential.” The exercise highlighted the role of the WHO’s Global Health Emergency Corps (GHEC), a framework launched in June 2025 to strengthen cross-border coordination in health workforce deployment during crises.

Key Frameworks and Technologies Put to the Test

Exercise Polaris II evaluated two critical WHO frameworks: the Global Health Emergency Corps (GHEC) and the National Health Emergency Alert and Response Framework. The GHEC, based on principles of sovereignty, equity, and solidarity, provides guidance for countries to enhance their emergency workforce capabilities. It supports information exchange and facilitates the deployment of regional and global emergency personnel when needed.

The simulation also explored the use of artificial intelligence (AI)-enabled tools to assist in workforce organization and planning. These technologies were tested for their potential to improve coordination, streamline decision-making, and enhance response efficiency during health emergencies.

Building on Previous Exercises

Exercise Polaris II follows the success of Polaris I, conducted in April 2025, which focused on a fictional viral outbreak. The 2025 exercise similarly engaged multiple countries and partners, allowing participants to refine their emergency response protocols. The progression from a viral to a bacterial scenario in Polaris II reflects the WHO’s commitment to preparing for diverse and evolving health threats.

The exercise is part of a broader effort by the WHO to strengthen global health security through regular simulation drills. Earlier in 2026, regional exercises such as SAPHIRE (South-East Asia), JADE (Europe), and IHR Exercise Crystal (Western Pacific) tested countries’ abilities to detect, report, and respond to public health threats under the International Health Regulations (IHR). These exercises have demonstrated improvements in cross-sectoral coordination, clarity of roles, and access to critical information platforms like the WHO’s Event Information Site (EIS).

Lessons Learned and Future Preparedness

The outcomes of Exercise Polaris II are expected to inform future capacity-building efforts, particularly in areas such as workforce mobilization, information sharing, and policy alignment. The exercise also provided insights into the practical application of AI tools in emergency response, which could shape the development of new technologies for health security.

While the simulation was based on a fictional scenario, its findings underscore the importance of sustained investment in global health preparedness. As Dr. Tedros noted, the exercise reinforced the need for trust, coordination, and solidarity among nations to effectively respond to health emergencies. The WHO plans to use the lessons from Polaris II to further refine its emergency frameworks and support countries in strengthening their resilience against future pandemics.

Public Health Implications

Simulation exercises like Polaris II play a critical role in identifying gaps in global health security. By testing response mechanisms in a controlled environment, countries can better prepare for real-world outbreaks, reducing the risk of delayed action and improving outcomes for affected populations. The exercise also highlights the ongoing need for international collaboration, as infectious diseases do not respect borders.

For public health officials, the results of Polaris II offer valuable data on how to optimize emergency response structures. The integration of AI tools, for example, could lead to more efficient resource allocation and faster decision-making during crises. Meanwhile, the emphasis on equity in the GHEC framework ensures that lower-resource countries are not left behind in global health emergency responses.

As the world continues to face emerging health threats, exercises like Polaris II serve as a reminder of the importance of proactive preparedness. While the scenario was hypothetical, the lessons learned are very real—and could make a significant difference in how the world responds to the next global health crisis.