Millions of children worldwide are growing up in the shadow of conflict, facing unimaginable hardships. Beyond the immediate dangers of war, these young lives are also gravely threatened by a silent killer: preventable diseases. A recent call to action from Doctors Without Borders (Médecins Sans Frontières – MSF) highlights an urgent crisis: the global strategy to ensure universal access to vaccines is critically failing children trapped in conflict zones. ## The Promise of Global Immunization Efforts At the heart of global health initiatives lies the World Health Organization's (WHO) Immunization Agenda 2030, an ambitious strategy designed to vaccinate more people across the globe and protect communities from infectious diseases. This comprehensive plan aims to reduce illness and death from vaccine-preventable diseases by ensuring everyone, everywhere, has access to the essential immunizations they need throughout their lives. It represents a collective commitment from governments, donors, and health organizations to build stronger health systems and reach the most vulnerable populations. However, for children in areas ravaged by conflict, this vital promise remains largely unfulfilled, leaving them dangerously exposed to outbreaks that could easily be avoided. ## Why Conflict Zones Are Falling Behind Delivering life-saving vaccines in conflict-affected regions presents a unique set of formidable challenges, effectively creating major gaps in coverage. These areas often experience a breakdown of basic services, making sustained vaccination efforts incredibly difficult: **Logistical Nightmares and Supply Chain Disruptions:** War damages infrastructure—roads, bridges, airports—making it nearly impossible to transport vaccines. Many vaccines require strict temperature control, known as a 'cold chain,' to remain effective. In areas without reliable electricity or refrigeration, maintaining this cold chain is a constant struggle, leading to wasted doses and delayed campaigns. **Security Risks and Access Restrictions:** Active conflict, shifting front lines, and widespread insecurity severely limit the ability of health workers to reach remote communities. Conversely, families may be unable to travel to health facilities due to fear of violence or displacement. This creates pockets of unvaccinated children who are then highly susceptible to disease outbreaks. **Financial Gaps and Resource Strain:** Humanitarian and health funding cuts disproportionately affect fragile states. Without adequate financial resources, it's impossible to procure enough vaccines, maintain equipment, train staff, or implement large-scale vaccination campaigns. The increased costs associated with operating in hazardous environments further strain already limited budgets. **Destroyed Health Infrastructure:** Hospitals, clinics, and health posts are often damaged or destroyed during conflicts. Even if they remain standing, they may lack staff, supplies, or basic functionality, making routine immunization services non-existent or severely hampered. ## The Dire Consequences: Deadly Outbreaks of Preventable Diseases The most devastating outcome of these systemic failures is the resurgence of vaccine-preventable diseases. Dr. Daniela Garone, MSF's international medical coordinator, starkly points out that dangerously low vaccination coverage leaves millions of children vulnerable to recurring, deadly outbreaks. Diseases like measles, diphtheria, tetanus, and pertussis (whooping cough) – all easily preventable with vaccines – become rampant when immunization rates drop below critical thresholds. Measles, for instance, is highly contagious and can be fatal, especially for malnourished children or those with weakened immune systems. It can lead to severe complications like pneumonia, encephalitis (brain swelling), and blindness. Diphtheria can cause breathing difficulties, heart failure, nerve damage, and paralysis. Tetanus, often contracted through wounds, can cause painful muscle spasms and lockjaw. Pertussis, or whooping cough, is particularly dangerous for infants, leading to severe coughing fits that can make it hard to breathe. ## Case Study: The Democratic Republic of Congo (DRC) The Democratic Republic of Congo exemplifies the challenges faced in conflict zones. Despite its vast natural resources, the DRC has endured decades of instability and conflict, particularly in its eastern provinces. In 2024, national immunization coverage rates were disturbingly low, far below the WHO-recommended thresholds needed to prevent outbreaks. For example, coverage for the DTP3 vaccine (diphtheria, tetanus, and pertussis) stood at 65 percent, significantly below the recommended 90 percent. Even more concerning, the first dose of the measles vaccine (MCV1) was at a worrying 55 percent, falling far short of the crucial 95 percent required to achieve herd immunity and protect communities. Intensified conflict in eastern DRC since 2025 has only compounded these issues. It has disrupted fragile supply chains, making the maintenance of the vital cold chain for vaccine viability incredibly difficult. Airport closures and blocked routes have delayed vaccine shipments, drastically increasing delivery costs and hindering MSF-supported vaccination campaigns. These challenges, coupled with global humanitarian funding cuts, meant that in 2025, only 60 percent of the required vaccine doses reached South Kivu province, according to the Ministry of Health. The tragic result: a massive measles epidemic in 2025, with over 82,869 suspected cases and 1,175 deaths recorded across almost all provinces. MSF teams worked tirelessly, treating approximately 20,870 patients and vaccinating over a million children, yet the epidemic continues into 2026. Dr. Jean Gilbert Ndong, MSF medical coordinator in DRC, emphasized that “systemic barriers emerging from and exacerbated by conflict dynamics are increasing unnecessary delays and limiting MSF’s ability to respond…swiftly.” ## Case Study: Sudan's Worsening Health Crisis Sudan, engulfed in three years of devastating war and instability, presents another grim picture. Its health systems, including vaccination programs and disease surveillance, have been severely weakened. Miriam Alía, MSF vaccination and outbreak advisor, highlights how organizing campaigns is hampered by delays in confirming outbreaks, limited diagnostic tools, and significant challenges in getting vaccine supplies. Political hurdles make cross-frontline delivery extremely difficult, meaning outbreaks often spread unchecked, causing unnecessary illness and death before vaccination efforts can even begin. In Darfur alone, MSF treated 14,613 measles cases between January and April of this year. Over the last three years, approximately 70 percent of measles patients treated in MSF-supported facilities in Darfur were children under five. A staggering 75 percent of all measles patients treated by MSF in Darfur were either unvaccinated or their vaccination status was unknown, underscoring the critical coverage gaps. ## An Urgent Call for Global Action Achieving the ambitious goals of the Immunization Agenda 2030 means ensuring no child is left behind, especially those in conflict-affected and hard-to-reach areas. Preventing outbreaks and saving millions of lives in countries like the DRC and Sudan demands immediate and sustained action from governments, warring parties, donors, and global health organizations. It requires more than just goodwill; it requires concrete commitments and political will. Dr. Garone's call to action is clear: sustained and agile financing is desperately needed for both routine and catch-up immunization activities, with dedicated funding specifically for conflict zones. Furthermore, all political and logistical blockages must be addressed to ensure rapid and unhindered access to vaccine supplies. Crucially, warring parties must guarantee support and safe passage for all health service providers—local and international—allowing them to reach every child who needs these life-saving shots. Prioritizing the health of children, even amidst conflict, is not just a humanitarian imperative; it is a fundamental step towards building a more stable and healthier future. ## The Health Thread's Take The plight of children in conflict zones, deprived of basic vaccinations, represents a profound failure of global responsibility. While the immediate focus might be on securing peace, the long-term health and well-being of an entire generation are at stake. Vaccinations are a fundamental right and a cost-effective intervention that can prevent immense suffering and save countless lives. The international community, political leaders, and all stakeholders must urgently prioritize these vulnerable children, transforming rhetoric into tangible action to deliver on the promise of health for all.