TAMPA, FL, USA (April 21, 2026) – The Global Virus Network (GVN) , representing eminent human and animal virologists from more than 90 Centers of Excellence and Affiliates in over 40 countries dedicated to advancing research, collaboration, and pandemic preparedness, is closely monitoring a significant resurgence of measles in the United States and globally, reflecting a growing vulnerability in public health systems.
Measles is resurging at a scale not seen in decades. The United States has already reported more than 1,700 cases across over 30 states in 2026 , following the highest annual total in more than 30 years in 2025. Large outbreaks driven overwhelmingly by declining vaccination coverage are raising concerns that the U.S. could lose its measles elimination status, a milestone achieved in 2000.
Recent increases in cases are directly linked to declining vaccination rates and gaps in routine immunization coverage. In many outbreaks, the overwhelming majority of cases are among unvaccinated individuals or those with unknown vaccination status. Post-pandemic disruptions, coupled with the spread of misinformation and declining public trust, have contributed to measurable drops in routine childhood immunizations.
This trend is not confined to the United States. Measles outbreaks are accelerating across multiple regions worldwide. In Europe , countries including Romania and the United Kingdom are experiencing renewed transmission linked to gaps in vaccination coverage, with Romania accounting for a substantial share of cases and the United Kingdom losing its measles elimination status amid declining immunization rates. In South Asia , including Afghanistan and Pakistan, measles remains endemic, reflecting persistent weaknesses in routine immunization. Recent outbreaks in Bangladesh and other densely populated settings highlight risks in vulnerable and displaced populations, while across sub-Saharan Africa , measles continues to cause substantial illness and death. Together, these patterns underscore a global reality: when vaccination coverage declines even modestly, measles returns quickly and spreads across borders.
Measles is one of the most contagious viral diseases known, yet it remains entirely preventable through safe and effective vaccination. Even small declines in immunization coverage can lead to outbreaks, as measles requires approximately 95% population immunity to prevent sustained transmission.
William Moss, MD , executive director of the International Vaccine Access Center at the Johns Hopkins Bloomberg School of Public Health, a GVN Center of Excellence, said, “Measles cases are one of the clearest indicators of how well our immunization systems are functioning. When fewer people are vaccinated, the virus exploits those gaps immediately. What we are seeing now, both in the United States and globally, is not a failure of the vaccine, but a failure to sustain the systems and trust required to deliver it consistently. The good news is that measles is entirely preventable. We need at least 95% vaccination coverage to protect every community.”
Measles is not a benign childhood illness. It can cause serious complications , including pneumonia, encephalitis, and death, particularly in young children and immunocompromised individuals. In addition, infection can lead to “immune amnesia,” weakening the body’s ability to fight other infections for an extended period.
The current resurgence is not due to a new or evolving virus, but rather a failure to sustain proven public health measures. This moment highlights the fragility of progress and the consequences of gaps in prevention.
What This Means for Preparedness
The return of measles underscores vulnerabilities in existing health systems and reinforces the importance of sustained vigilance. Key priorities include:
The tools to prevent measles are well established. The priority now is to ensure they are implemented consistently and effectively. Without immediate and coordinated action, preventable outbreaks will continue to expand, placing unnecessary strain on healthcare systems and putting vulnerable populations at risk.
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Media Contacts:
Nora Samaranayake
Global Virus Network
About the Global Virus Network
The Global Virus Network (GVN) is a worldwide coalition comprising 90+ Virology Centers of Excellence and Affiliates across 40+ countries, whose mission is to facilitate pandemic preparedness against viral pathogens and diseases that threaten public health globally. GVN advances knowledge of viruses through (i) data-driven research and solutions, (ii) fostering the next generation of virology leaders, and (iii) enhancing global resources for readiness and response to emerging viral threats. GVN provides the essential expertise required to discover and diagnose viruses that threaten public health, understand how such viruses spread illnesses, and facilitate the development of diagnostics, therapies, and treatments to combat them. GVN coordinates and collaborates with local, national, and international scientific institutions and government agencies to provide real-time virus informatics, surveillance, and response resources and strategies. GVN's pandemic preparedness mission is achieved by focusing on Education & Training, Qualitative & Quantitative Research, and Global Health Strategies & Solutions. The GVN is a non-profit 501(c)(3) organization. For more information, please visit www.gvn.org .