What Happened to Global Measles Outbreak Resurgence?
Measles outbreaks have surged globally in 2025 and 2026, driven by declining vaccination rates, disruptions from the COVID-19 pandemic, and growing vaccine hesitancy. This resurgence threatens decades of progress towards measles elimination, with several countries losing or at risk of losing their measles-free status.
Quick Answer
Global measles outbreaks have seen a significant resurgence in 2025 and 2026, with the World Health Organization estimating nearly 11 million cases worldwide in 2026. This alarming trend is primarily due to a decline in routine childhood vaccination coverage, exacerbated by the COVID-19 pandemic's impact on immunization programs and increasing vaccine hesitancy. Countries like the United States, Bangladesh, and South Africa are experiencing record-high case numbers, and several nations in the Americas and Europe have lost or are on the verge of losing their measles elimination status.
📊Key Facts
📅Complete Timeline14 events
Global Immunization Rates Stall Post-Pandemic
Global childhood immunization rates stalled, leaving 2.7 million additional children un- or under-vaccinated compared to pre-pandemic levels in 2019. Measles cases surged to an estimated 10.3 million worldwide, up 22% from the previous year.
Significant Increase in European Measles Cases
Europe reported 127,412 measles cases in 2024, a substantial increase and the highest in decades, driven by declining vaccination rates and vaccine hesitancy.
Canada's Outbreak Begins, Leading to Loss of Elimination Status
A deadly measles outbreak began in Canada, particularly affecting conservative Mennonite communities with low vaccination rates. This sustained transmission would eventually lead to Canada losing its measles-free status.
US Measles Resurgence Begins in Texas
The United States began experiencing a significant measles resurgence, starting with an outbreak in Texas that lasted from January to August 2025. This marked the beginning of the country's worst year for measles in over three decades.
Canada Loses Measles Elimination Status
The Pan American Health Organization (PAHO) revoked Canada's official measles-free status due to prolonged endemic transmission, particularly from the outbreak that began in October 2024.
Six European Countries Lose Elimination Status
Armenia, Austria, Azerbaijan, Spain, the United Kingdom, and Uzbekistan lost their WHO measles elimination status after experiencing continuous transmission for over a year.
Major Outbreak Begins in Bangladesh
Bangladesh began experiencing one of its worst measles outbreaks in decades, spreading rapidly across the country. By April 23, over 19,000 suspected cases and 166 suspected deaths were reported.
Japan Reports Significant Increase in Cases
Japan reported 362 measles cases as of April 22, a 336% increase compared to the same period in 2025, indicating a growing outbreak.
Bangladesh Approves Direct Vaccine Procurement Amid Crisis
Faced with a surging outbreak, Bangladesh's cabinet approved a return to direct vaccine procurement through UNICEF to stabilize the supply chain for its emergency mass-vaccination drive.
Bangladesh Outbreak Becomes World's Largest
Bangladesh's measles outbreak was reported as the world's largest in terms of case count, with 131,946 suspected cases, 16,531 confirmed infections, and 849 child deaths.
US Measles Cases Reach 35-Year High
The United States confirmed 2,777 measles cases, surpassing the total for all of 2025 and marking a 35-year high, with 94% of cases among unvaccinated individuals.
WHO Estimates 11 Million Global Cases for 2026
The World Health Organization estimated that nearly 11 million people would contract measles globally in 2026, highlighting the severe and widespread nature of the resurgence.
US Vaccination Rates Decline, Threatening Elimination Status
CDC data for the 2025-2026 school year showed MMR vaccination coverage for kindergartners dropped to 92.4%, below the 95% threshold for herd immunity, increasing the likelihood of the US losing its measles elimination status in November 2026.
South Africa Reports Over 3,400 Cases Amid Declining Coverage
South Africa's Department of Health reported 3,462 laboratory-confirmed measles cases since January 2026, with the proportion of unvaccinated infants tripling since 2017, contributing to ongoing outbreaks across provinces.
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🔍Deep Dive Analysis
The world is currently grappling with a significant resurgence of measles, a highly contagious disease previously targeted for elimination. This crisis, particularly pronounced in 2025 and 2026, marks a severe setback to global public health efforts. The World Health Organization (WHO) estimates that nearly 11 million people will contract measles in 2026, with the majority of cases occurring in Africa and Asia, but also affecting thousands in the Americas and Europe.
The primary driver behind this resurgence is a substantial decline in global vaccination rates. Routine immunization campaigns were severely disrupted during the COVID-19 pandemic, leading to millions of children missing their measles vaccine doses. In 2023, 2.7 million more children were un- or under-vaccinated compared to pre-pandemic levels in 2019. By 2025, approximately 29 million infants remained under-protected against measles. This has created large immunity gaps, making populations highly susceptible to outbreaks. Vaccine hesitancy and the spread of misinformation and disinformation have further compounded the problem, particularly in high-income countries.
Regional impacts are stark. In the Americas, measles resurged in 2025-2026, undermining years of elimination efforts. The region saw a 32-fold surge in cases in 2025 alone, with 14,891 confirmed cases and 29 fatalities across 13 countries. Canada officially lost its measles elimination status in November 2025, and the United States and Mexico are expected to follow suit in November 2026 due to sustained transmission. The U.S. reported 2,903 confirmed cases as of August 30, 2026, marking a 35-year high. Guatemala has reported over 30,000 cases in 2026, linked to low vaccination rates in certain communities.
Europe has also experienced a significant increase in cases, with 7,655 people sickened in the EU and nearby countries in 2025. In January 2026, six European countries—Armenia, Austria, Azerbaijan, Spain, the United Kingdom, and Uzbekistan—lost their WHO measles elimination status. Bangladesh is experiencing one of its worst outbreaks in decades, with over 131,000 suspected cases and 849 child deaths reported by early August 2026, attributed to political turmoil, vaccine shortages, and disrupted campaigns. South Africa has confirmed over 3,500 cases in 2026, with vaccination coverage declining from 95% to 70-80%.
The consequences of these outbreaks are severe, including increased hospitalizations, long-term health complications like deafness and blindness, and a significant number of deaths, predominantly among children under five. The weakening of immune systems post-measles infection, known as 'immunity amnesia,' also leaves children vulnerable to other diseases. Public health systems are strained, and there's a critical need for renewed efforts to close immunity gaps, combat misinformation, and ensure equitable access to vaccines globally.
What If...?
Explore alternate histories. What if Global Measles Outbreak Resurgence made different choices?