Not a one-time drill, but an evolving national programme
In the long arc of humanity's struggle against catastrophe, the World Health Organization has taken a quiet but consequential step: formalizing the practice of rehearsal as a permanent pillar of national health security. Released in March 2026, the new National Health Simulation Exercise Programme framework asks governments to move beyond occasional drills and embed continuous, structured preparedness into the very institutions meant to protect their populations. The lesson drawn from recent global crises is ancient in its simplicity — those who have practiced together respond better when it matters most.
- Pandemics, radiological incidents, and climate disasters have repeatedly exposed the same failures — agencies that cannot coordinate, communication systems that collapse, and surge capacity that exists only on paper.
- The WHO's NHSEP framework responds to this chronic vulnerability by transforming emergency drills from isolated obligations into permanent, government-led programs anchored to each country's actual risk profile.
- Ukraine tested the model under real pressure in 2024, running a tabletop radiological emergency exercise that uncovered concrete coordination gaps between agencies — findings that became a documented roadmap for reform.
- The companion HorizonX initiative escalates the ambition further, stress-testing national and regional systems through progressively complex, multi-year simulation cycles designed to build genuine operational muscle.
- The trajectory is clear: preparedness is no longer an event to schedule and forget, but a continuous institutional discipline — so that when the next crisis arrives, coordination is memory, not improvisation.
The world has learned a costly lesson from recent crises: countries that have practiced together respond better than those that haven't. The WHO has now formalized that insight into a framework released this month, asking governments to stop treating emergency drills as occasional events and start building them into the permanent machinery of national health security.
The threat landscape no longer permits complacency. Pandemics, radiological incidents, chemical spills, and climate disasters have repeatedly exposed the same gaps — coordination failures, communication breakdowns, and the inability to surge capacity when lives depend on it. A simulation exercise, conducted before the crisis arrives, offers a controlled environment to find and fix these weaknesses.
The new National Health Simulation Exercise Programme, or NHSEP, is a systematic, government-led approach anchored to a country's actual risk profile and designed to turn lessons learned into real policy change. Ukraine offers a striking example of the framework in action. In August 2024, WHO trained a national cadre of facilitators drawn from public health, emergency services, and radiological preparedness. That September, those facilitators ran a tabletop exercise simulating a nuclear power plant emergency — testing whether agencies could coordinate, whether communication channels held, and where the gaps were.
The exercise delivered. It surfaced concrete problems, including coordination bottlenecks between agencies and the need for more frequent local drills. These findings became an evidence-based roadmap for strengthening Ukraine's radionuclear preparedness, later published in a peer-reviewed journal. Ukraine has since conducted a series of follow-up exercises, each one refining its capabilities further — because NHSEP is not a box to check once, but a continuous learning program.
Complementing this national effort, the WHO is launching HorizonX, a multi-year global initiative that stress-tests preparedness systems through progressively complex simulations at national and regional levels. Together, these efforts represent a fundamental shift in how the world approaches emergency readiness — from periodic obligation to permanent institutional discipline, so that when the next crisis arrives, the response is muscle memory rather than improvisation.
The world has learned a hard lesson over the past few years: when a health crisis arrives, countries that have practiced together respond better than those that haven't. The World Health Organization has now formalized that insight into a new framework, released this month, that asks governments to stop treating emergency drills as occasional events and start building them into the permanent machinery of national health security.
The threat landscape has shifted. Pandemics, radiological incidents, chemical spills, climate disasters—these are no longer hypothetical scenarios. They are recurring tests of whether a country's hospitals, agencies, and officials can actually talk to each other when it matters. Recent global crises have exposed the same gaps over and over: coordination failures, communication breakdowns, logistical bottlenecks, the inability to surge capacity when needed. A simulation exercise, conducted before lives are on the line, offers a way to find these weaknesses in a controlled environment and fix them.
The WHO's new guidance introduces the National Health Simulation Exercise Programme, or NHSEP—a systematic, government-led approach to building preparedness through repeated, structured drills. Unlike one-off exercises that happen and then fade, an NHSEP is anchored to a country's actual risk profile, aligned with its health priorities, woven into its monitoring systems, and designed to turn what is learned into real policy and operational change. The shift is from reacting when crisis strikes to staying ready all the time.
Ukraine offers a concrete example of how this works in practice, even under the most difficult circumstances. In August 2024, the WHO ran a training workshop in the country to build a national cadre of facilitators—specialists drawn from public health, disaster medicine, emergency services, veterinary medicine, and chemical-biological-radiological-nuclear preparedness. These newly trained facilitators then designed and ran exercises tailored to Ukraine's own risk priorities and aligned with international health regulations. The first major test came in September 2024: a tabletop exercise simulating a radiological emergency at a nuclear power plant. Dr. Jarno Habicht, the WHO's representative in Ukraine, explained the goal was straightforward—to test whether different agencies could coordinate, whether communication channels worked, whether the country actually knew how to respond to a radiological-nuclear incident, and where the gaps were.
The exercise worked exactly as intended. It surfaced concrete operational problems that might otherwise have remained hidden: the need for more frequent local drills, coordination bottlenecks between agencies. These findings became an evidence-based roadmap for strengthening Ukraine's radionuclear preparedness, documented in a paper published in December 2025 in the Cambridge University journal Disaster Medicine and Public Health Preparedness. But Ukraine did not stop there. The country has since conducted a series of follow-up exercises, each one testing and refining its response capabilities further. This is the point: NHSEP is not a box to check once. It is a continuous learning program.
The WHO is also launching a companion global initiative called HorizonX, a multi-year effort designed to stress-test preparedness systems at national and regional levels through progressively complex exercises—tabletop simulations, functional drills, full-scale operations. The program is guided by what it calls the 4Cs + I framework: exercises grounded in real risk contexts, measuring actual functional performance rather than static capacity, centered on what individual countries need, institutionalizing continuous learning, and ultimately delivering measurable gains in health security at the population level.
What the WHO is describing is a fundamental shift in how the world thinks about emergency preparedness. For too long, countries have treated drills as periodic obligations, something to do and then move on from. The new framework says: make it permanent. Build it into your institutions. Test your systems regularly. Learn from each exercise. Adjust your plans. Do it again. When the next crisis arrives—and it will—the teams will have practiced, the plans will have been tested, and the coordination will be muscle memory rather than improvisation.
Citações Notáveis
We aimed to review the ability to respond to radiological-nuclear incidents, test coordination among different actors, improve communication, and identify areas for improvement.— Dr. Jarno Habicht, WHO Representative in Ukraine
A Conversa do Hearth Outra perspectiva sobre a história
Why does the WHO think countries need a formal program for this? Haven't they been running drills all along?
They have, but mostly as one-off events. A country runs a drill, files a report, and then nothing happens until the next crisis. The new framework says: make it systematic. Anchor it to your actual risks. Build it into your institutions so it never stops.
And Ukraine is the proof of concept?
Exactly. They took the framework and ran with it in August 2024, trained facilitators, then ran a radiological emergency simulation in September. Found real gaps—coordination problems, communication failures—that they could actually fix.
What kind of gaps?
Things like needing more frequent local drills, bottlenecks between different agencies that should have been talking to each other. The kind of thing you only discover when you actually simulate the crisis.
So they fixed those things and moved on?
No. They kept going. They've run multiple exercises since then, each one testing and refining the response further. That's the whole point—it's not a one-time event. It's continuous.
And HorizonX is the global version?
It's a companion program. While countries build their own national programs, HorizonX runs progressively complex exercises at the global and regional level, stress-testing the whole system. Different scales, same principle: practice, learn, adjust, practice again.