POLICY BRIEF

Expanding Vaccine Access for
Everyone, Everywhere at Every Age

Vaccines are among the most cost-effective and impactful public health interventions, preventing an estimated 4 to 5 million deaths annually worldwide (WHO, 2024). They play a critical role in achieving Sustainable Development Goal (SDG) 3, particularly SDG 3.3 (ending epidemics of AIDS, tuberculosis, malaria, and neglected tropical diseases) and SDG 3.8 (achieving Universal Health Coverage, UHC). The WHO Immunization Agenda 2030 provides a global strategy to ensure that everyone, everywhere, at every age, fully benefits from vaccines to improve health and well-being. Yet, despite substantial progress, vaccine-preventable diseases still cause hundreds of thousands of deaths each year. Gaps in vaccine coverage, equity, and public trust – compounded by challenges such as misinformation, conflict, and climate-related disruptions – threaten to reverse decades of immunization gains. The COVID-19 pandemic underscored both the power of vaccines and the vulnerabilities of global supply chains, highlighting the need for robust, equitable, and resilient immunization systems. This Fast-Track Health policy brief highlights best practices through five case studies, discusses challenges and opportunities, and provides actionable recommendations for municipal, national, and regional health authorities.

MMR Vaccination in the United States: The United States achieved elimination of endemic measles, mumps, and rubella in the early 2000s through high coverage of the MMR vaccine. However, recent outbreaks linked to vaccine hesitancy highlight the fragility of progress. Community engagement campaigns, tailored provider communication, and policy mandates have been central to restoring trust and maintaining herd immunity. In recent years, combination vaccines such as the MMRV (measles, mumps, rubella, and varicella) have been introduced to simplify immunization schedules, further improving convenience and uptake among children. (CDC, 2020)

Life Course Immunization and COVID-19 Lessons in the United Kingdom: The United Kingdom’s National Health Service (NHS) delivers vaccines across the life course, from childhood immunizations to influenza and shingles vaccination for older adults. During COVID-19, the NHS leveraged mass vaccination sites, general practitioner networks, pharmacies, and mobile units to reach both urban and rural populations, with targeted outreach for minority ethnic communities. The experience reinforced the importance of flexible, multi-channel delivery models and community trust-building for achieving high coverage in diverse populations. (UK Health Security Agency, 2022)

Family Health Strategy and Community-Embedded Immunization in Brazil: Brazil’s Family Health Strategy deploys multidisciplinary teams to provide comprehensive primary care, including routine immunizations, in both urban favelas and remote rural areas. Vaccination is offered through fixed clinics, mobile teams, and outreach to schools and workplaces, supported by electronic immunization registries. This community-embedded approach ensures continuity of immunization services and enables rapid mobilization during outbreaks, providing a model for equitable vaccine delivery in geographically diverse nations. (Health Affairs, 2017)

Polio Eradication in Nigeria: Nigeria was declared free of wild poliovirus in 2020 after decades of vaccination campaigns supported by strong community mobilization. Partnerships with traditional and religious leaders helped overcome resistance in areas with high hesitancy. The achievement reinforced the importance of adapting global strategies to local contexts, particularly in fragile or conflict-affected settings. Sustained surveillance and continued use of oral polio vaccines remain essential to prevent re-emergence, highlighting the need for vigilance even after elimination milestones are reached. (Global Polio Eradication Initiative, 2020)

HPV Vaccination for All Genders in Australia: Australia expanded its national HPV vaccination program to include boys in 2013, delivered primarily through schools, achieving some of the highest HPV coverage rates globally. This gender-neutral approach has already shown population-level declines in HPV prevalence and genital warts, with projected reductions in HPV-related cancers across both sexes. Australia’s success underscores the value of equitable, gender-inclusive vaccination policies to maximize population health impact. (The Lancet Infectious Diseases, 2016)

Global vaccination efforts face a complex mix of operational, political, and social challenges. Vaccine hesitancy – driven by misinformation, mistrust of institutions, and politicization of science – has emerged as a major threat to immunization uptake worldwide. Inequitable distribution persists both between and within countries, with marginalized communities, conflict-affected areas, and remote regions often experiencing lower coverage and delayed access. Supply chain fragility, inadequate cold chain infrastructure, and underfunded health systems limit timely delivery, particularly during climate-related disruptions such as floods or heat waves. Emerging infectious diseases and antimicrobial resistance highlight the need for accelerated vaccine development pipelines, yet regulatory, financing, and manufacturing bottlenecks slow progress. In addition, data gaps and insufficient surveillance hamper the ability to track coverage, identify immunity gaps, and guide targeted interventions.

The next decade presents unprecedented opportunities to strengthen vaccine access, equity, and innovation. mRNA technology, validated during the COVID-19 pandemic, offers rapid adaptability for emerging pathogens and could transform vaccine development for HIV, TB, malaria, and cancer. Regional vaccine manufacturing hubs, such as those emerging in Africa and Southeast Asia, can bolster supply security and reduce dependence on imports. Integrating immunization into universal health coverage (UHC) ensures that vaccines are delivered as part of a comprehensive package of preventive and primary care services. Leveraging digital health tools, including electronic immunization registries and AI-driven demand forecasting, can improve coverage monitoring and reduce stockouts. Partnerships across public, private, and community sectors can accelerate gender-neutral HPV vaccination, adult immunization, and climate-resilient vaccine delivery systems, ensuring that even in the face of public health emergencies, essential immunization services continue uninterrupted.