WHO Raises Alarm Over Vaccine Misinformation
The World Health Organization has identified rising misinformation and uncertain research funding as critical threats to global vaccine programmes, warning that public trust in immunisation is eroding amid coordinated campaigns spreading false information about vaccine safety.
The warning came Wednesday from the WHO’s Strategic Advisory Group of Experts on Immunisation, which concluded its biannual meeting last week with urgent recommendations on protecting core immunisation programmes against mounting challenges that could reverse decades of progress in disease prevention.
“Emerging challenges for the future include uncertain funding for vaccine research and development, and misinformation and distorted information that erodes public trust in vaccines,” SAGE stated in its report. “Protecting trust and countering misinformation will be a central focus in 2026.”
The group’s concerns reflect a broader crisis in global public health as vaccine hesitancy spreads across multiple continents, fueled by social media platforms amplifying debunked theories linking vaccines to autism, infertility, and other unsubstantiated harms. The appointment of Robert F. Kennedy Jr. as United States health chief has intensified these concerns, given his long history of promoting anti-vaccine rhetoric and inaccurate claims connecting vaccines to autism despite overwhelming scientific evidence to the contrary.
Kate O’Brien, WHO’s vaccines chief, told a press conference that resources would be concentrated this year on protecting the rollout of essential immunisation programmes threatened by conflicts, economic pressures, and shrinking health budgets.
“We’re in a really deeply changing world for infectious diseases and for vaccine programmes,” she said, noting that public trust in vaccines is being “threatened by misinformation.”
O’Brien directly addressed the vaccine-autism conspiracy theories that have gained renewed prominence following Kennedy’s elevation to a senior health position in the United States government.
“Vaccines do not cause autism and they never have caused autism,” she stated, referencing a WHO review of all available evidence issued in December 2025 that reaffirmed no scientific link exists between vaccines and autism spectrum disorders.
The WHO vaccines chief emphasized that immunisation programmes have saved 154 million lives over the past 50 years, with more than 30 diseases now preventable through vaccination. These include polio, measles, diphtheria, tetanus, pertussis, hepatitis B, pneumonia, rotavirus diarrhea, and human papillomavirus, among others.
However, O’Brien warned that the greatest risk facing global health systems is “backsliding, or even countries deciding that they can’t afford all of the vaccines that are in their programme,” a development that could reverse gains achieved since the Expanded Programme on Immunization was launched by WHO in 1974.
The Expanded Programme on Immunization, which initially targeted six diseases, has evolved into a comprehensive global framework that reaches more than 80 percent of the world’s children annually. According to WHO data, global vaccination coverage prevented an estimated 4 to 5 million deaths each year prior to the COVID-19 pandemic, which disrupted routine immunisation services in numerous countries.
SAGE expressed particular concern over ongoing transmission of wild poliovirus in Pakistan and Afghanistan, the only two countries where the virus remains endemic, and the persistent detection of vaccine-derived type-2 poliovirus in several African countries. Vaccine-derived poliovirus is a rare strain that can emerge in communities with low immunisation coverage when the weakened live poliovirus contained in oral polio vaccines mutates over time.
Anthony Scott, SAGE chair, warned that the escalating conflict in the Middle East could further complicate global polio eradication efforts by creating conditions for virus transmission in war zones where vaccination campaigns cannot safely reach children.
“The conflict in the Middle East may well lead to further dissemination of polioviruses, which would then add to the burden to be mopped up in order to reach that eradication goal,” Scott told reporters.
O’Brien drew a stark contrast between military expenditures and investment in public health programmes, questioning global priorities in resource allocation.
“There are billions and billions of dollars being spent, day in and day out to destroy lives through wars. Does the world have its priorities straight about what we’re investing in?” she said.
The polio eradication initiative, launched in 1988 when the disease paralyzed approximately 350,000 children annually across 125 endemic countries, has reduced wild poliovirus cases by more than 99 percent. Pakistan reported 67 wild poliovirus cases in 2024, while Afghanistan recorded 26 cases, according to the Global Polio Eradication Initiative’s data. However, insecurity, population displacement, and vaccination resistance in conflict zones continue to hamper efforts to eliminate the final reservoirs of transmission.
On COVID-19 vaccination, SAGE recommended that countries consider routine immunisation twice annually for groups at highest risk of severe disease, including elderly populations and individuals with compromised immune systems, due to evidence showing vaccine protection wanes significantly beyond six months.
O’Brien noted that the COVID-19 vaccine market has contracted considerably since the pandemic’s peak, with a limited number of manufacturers now producing vaccines and mRNA formulations remaining the dominant technology. She called for increased investment in developing pan-coronavirus vaccines capable of protecting against multiple coronavirus strains beyond SARS-CoV-2, as well as longer-lasting formulations that would reduce the burden of repeated vaccinations on healthcare systems and vulnerable populations.
The WHO vaccines chief warned that research and development funding typically follows major disease outbreaks rather than supporting sustained preparedness efforts, creating a problematic pattern of reactive rather than proactive investment.
“We are always in this cycle of crisis and response,” she said, arguing that this approach leaves health systems vulnerable to emerging infectious disease threats.
Annelies Wilder-Smith, SAGE executive secretary, said the organization urgently needs COVID-19 vaccines with greater impact on mild disease and improved capacity to reduce virus transmission, features that current vaccines provide only to a limited degree.
The SAGE meeting, held last week, also reviewed recommendations on typhoid vaccine dosing schedules and the use of oral polio vaccine doses in routine immunisation programmes. Typhoid fever, caused by Salmonella typhi bacteria, affects an estimated 11 to 21 million people annually and causes approximately 128,000 to 161,000 deaths, predominantly in South Asia and sub-Saharan Africa, according to WHO estimates.
The challenges outlined by SAGE come as multiple countries report declining childhood immunisation rates following disruptions caused by the COVID-19 pandemic. UNICEF data from 2023 showed that 67 million children missed out on one or more vaccines between 2019 and 2021, with the backlog creating vulnerability to outbreaks of measles, diphtheria, and other vaccine-preventable diseases.
Measles cases have surged in several regions, with WHO reporting a 79 percent increase in measles cases globally in 2023 compared to 2022, driven by gaps in vaccination coverage. The resurgence of measles, a highly contagious disease that was declared eliminated in several countries, illustrates the fragility of immunisation programmes when coverage rates drop below the threshold needed for herd immunity.
The misinformation challenge has been compounded by the spread of conspiracy theories on social media platforms, where algorithms often amplify emotionally charged content regardless of accuracy. Studies have documented organized disinformation campaigns targeting vaccines, with some traced to specific actors seeking to undermine public health institutions.
WHO has partnered with technology companies to combat vaccine misinformation, but efforts have yielded mixed results as false claims continue to spread faster than corrections. The organization has called for stronger regulatory frameworks to hold platforms accountable for health misinformation that puts lives at risk.
The funding uncertainty highlighted by SAGE reflects broader challenges in global health financing, as donor countries face competing domestic priorities and economic pressures. Gavi, the Vaccine Alliance, which supports immunisation programmes in lower-income countries, requires sustained contributions from donor governments to maintain vaccine access in 57 countries that would otherwise struggle to afford essential vaccines.
The WHO has not issued specific projections on potential mortality increases if vaccine coverage continues to decline, but historical data shows that lapses in immunisation programmes have led to rapid disease resurgence. The 2019 measles outbreak in Democratic Republic of Congo, which killed more than 6,000 people, predominantly children under five, demonstrated the deadly consequences of vaccination gaps.
SAGE’s warning underscores the vulnerability of global health gains to political instability, economic shocks, and coordinated misinformation, with the group calling for renewed commitment from governments, civil society, and international institutions to protect immunisation programmes that have proven among the most cost-effective public health interventions in history.
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