Measles Surge: Vaccination Rates Fall | CDC Update

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Measles Cases Surge Globally, Threatening Decades of Progress

Despite meaningful gains in reducing measles deaths over the past quarter-century, a new report from the World Health Organization (WHO) reveals a worrying resurgence of the disease worldwide. Global immunization efforts have achieved an 88% reduction in measles fatalities since 1999, but cases are now climbing at an alarming rate, fueled by declining vaccination rates and funding shortfalls.

A Tripling of Outbreaks

Last year, 59 countries experienced significant or disruptive measles outbreaks – nearly three times the number reported in 2021 and the highest figure since the start of the COVID-19 pandemic. An estimated 11 million people were infected in 2024, representing an increase of almost 800,000 cases compared to pre-pandemic levels in 2019.

Did you know?– Measles is highly contagious. An infected person can spread the virus to nearly everyone who is not vaccinated. Symptoms include fever, rash, cough, and potentially serious complications.

The WHO data indicates significant regional variations. The Eastern mediterranean region saw an 86% increase in cases in 2024 compared to 2019, followed by the European Region with a 47% rise and the south-East Asian Region with a 42% increase.However, the African Region bucked the trend, experiencing a 40% decline in cases and a 50% reduction in deaths, attributed in part to improved immunization coverage.

Reader question:– Why are measles outbreaks happening even in countries with generally high vaccination rates? Localized pockets of unvaccinated individuals can sustain outbreaks, highlighting the need for 95% coverage.

Americas Face a Shifting Landscape

While most regions reported outbreaks in 2024, the situation evolved in 2025. According to the WHO, numerous countries in the Americas began battling outbreaks after a period of relative control. The Region of the Americas briefly regained measles elimination status in 2024, only to lose it again in November 2025 due to ongoing transmission, specifically in Canada.

Pro tip:– Two doses of the measles vaccine are crucial for full protection. The first dose provides initial immunity, while the second boosts and sustains that protection long-term.

Funding Cuts and Under-Vaccination Fuel the Crisis

The WHO has warned that “deep funding cuts” to national immunization programs and the Global Measles and Rubella Laboratory network (GMRLN) – which is crucial for testing samples – could exacerbate the situation and lead to further outbreaks in the coming year. A staggering 30 million children were under-protected against measles in 2024,with three-quarters of these vulnerable children residing in the African and Eastern Mediterranean regions,frequently enough in areas affected by conflict or instability.

Current vaccination rates are falling short of the levels needed to maintain herd immunity. Approximately 84% of children received their first dose of the measles vaccine last year, but only 76% received the crucial second dose. Public health officials emphasize that at least 95% coverage with two doses is essential to halt transmission and protect communities.

Resurgence Even in High-Income Nations

“Measles has resurged in recent years, even in high-income countries that once eliminated it, as immunization rates have dropped below the 95% threshold,” a senior WHO official stated. Even within countries with high national coverage, localized pockets of unvaccinated individuals can create vulnerabilities and sustain outbreaks.

The Immunization Agenda 2030 (IA2030) Mid-Term Review underscores that measles is frequently enough the first disease