Measles Outbreaks Surge Amid Vaccine Gaps

What's happened

As of February 2026, measles outbreaks are intensifying in England, the US, and Australia due to declining vaccination rates and rising vaccine hesitancy. London boroughs report under 80% MMR coverage, far below the 95% WHO target, leading to hospitalizations and confirmed cases. US states like South Carolina face their largest outbreaks in decades, while Australia sees rising cases linked to international travel and vaccine skepticism.

What's behind the headline?

Measles Resurgence Reflects Global Vaccine Hesitancy Crisis

The current measles outbreaks in England, the US, and Australia expose the fragility of public health gains made over decades. Despite the availability of a highly effective MMR vaccine, vaccination rates have fallen below the critical 95% threshold needed to prevent outbreaks. This decline is driven by a complex mix of cultural hesitancy, misinformation, and pandemic-era disruptions to routine healthcare.

Urban Centers as Epicenters

London's boroughs, including Enfield and Hackney, show vaccination rates as low as 58.3% for two MMR doses among five-year-olds, creating pockets where measles can spread rapidly. Similar urban clusters in US states and Australian cities highlight how localized vaccine gaps can undermine national herd immunity.

Policy and Public Messaging Challenges

The US faces internal contradictions, with Health Secretary Robert F. Kennedy Jr.'s vaccine skepticism contrasting with clear pro-vaccine messaging from officials like Dr. Mehmet Oz. This mixed messaging complicates public trust and may contribute to hesitancy. Meanwhile, Australia's post-pandemic vaccine fatigue and underestimation of measles' severity exacerbate the problem.

Forecast and Consequences

Without urgent action to restore vaccination coverage, measles outbreaks will continue to grow, risking severe complications, hospitalizations, and deaths, especially among infants too young for vaccination. Public health systems must prioritize targeted education, counter misinformation, and facilitate vaccine access to regain control.

Impact on Readers

Individuals should recognize the critical importance of timely vaccination to protect themselves and vulnerable populations. The resurgence of measles is not an abstract threat but a direct consequence of collective vaccination behavior, underscoring the need for informed health decisions.

How we got here

Measles, a highly contagious viral disease preventable by the MMR vaccine, requires at least 95% vaccination coverage to maintain herd immunity. Since 2021, vaccination rates have declined globally due to misinformation, cultural factors, and pandemic disruptions, causing measles transmission to re-establish in regions previously declared measles-free.

Our analysis

The Independent highlights London's alarmingly low MMR vaccination rates, noting that no area in England has reached the WHO's 95% target, with boroughs like Enfield and Hackney reporting rates below 65%. It reports 96 confirmed measles cases in England in 2026, mostly in London and the West Midlands, and stresses the risk to unvaccinated children and infants relying on herd immunity. Professor Stuart Neil attributes hesitancy to cultural factors and misinformation. Sky News reports on the rapid spread in Enfield schools, with one in five infected children hospitalized, emphasizing the virus's contagiousness and the potential for tens of thousands of infections in London. Enfield officials are coordinating with health agencies to manage the outbreak. The New York Times and NY Post focus on the US context, where measles outbreaks in South Carolina and other states mark the largest resurgence since 2000. Dr. Mehmet Oz urges vaccination, contrasting with Health Secretary Robert F. Kennedy Jr.'s more cautious stance, illustrating internal policy tensions. The NY Post details how measles spreads via airborne droplets lingering for hours, underscoring the urgency. SBS reports on Australia's rising measles cases linked to international travel and vaccine skepticism, with experts warning of the disease's extreme contagiousness and the drop in vaccination rates below the 95% herd immunity threshold. Reuters provides a broader European perspective, noting a decline in measles cases in 2025 but warning that transmission remains re-established in many countries due to immunity gaps. Together, these sources reveal a global pattern of measles resurgence fueled by vaccine hesitancy, misinformation, and uneven public health responses.

Go deeper

• Why are measles vaccination rates falling in major cities?
• What are the risks of measles for unvaccinated children?
• How are health officials responding to the outbreaks?

More on these topics

• measles - Viral disease affecting humans

  Measles (probably from Middle Dutch or Middle High German masel(e), meaning "blemish, blood blister") is a highly contagious, vaccine-preventable infectious disease caused by measles virus. Other names include morbilli, rubeola, 9-day measles, red measles

• Mehmet Öz - American-Turkish television personality

  Mehmet Cengiz Öz, known professionally as Dr. Oz, is a Turkish-American television personality, cardiothoracic surgeon, Columbia University professor, and author.

• World Health Organization

  The World Health Organization is a specialized agency of the United Nations responsible for international public health. The WHO Constitution, which establishes the agency's governing structure and principles, states its main objective as "the attainment

• South Carolina - US State

  South Carolina is a state in the Southeastern United States and the easternmost of the Deep South. It is bordered to the north by North Carolina, to the southeast by the Atlantic Ocean, and to the southwest by Georgia across the Savannah River.

• UK Health Security Agency - Government agency

  The UK Health Security Agency is a government agency in the United Kingdom, responsible since April 2021 for UK-wide public health protection and infectious disease capability, and replacing Public Health England.

• Robert F. Kennedy Jr. - American politician, environmental lawyer, anti-vaccine activist, and conspiracy theorist (born 1954)

  Robert Francis Kennedy Jr. (born January 17, 1954), also known by his initials RFK Jr., is an American politician, environmental lawyer, author, conspiracy theorist, and anti-vaccine activist serving as the 26th United States secretary of health and human

• United States - Country in North America

  The United States of America, commonly known as the United States or America, is a country mostly located in central North America, between Canada and Mexico.

• United States Centers for Disease Control and Prevention - Public agency

  The Centers for Disease Control and Prevention is a national public health institute in the United States. It is a United States federal agency, under the Department of Health and Human Services, and is headquartered in Atlanta, Georgia.