Foreign interference and online misinformation are actively eroding public trust in routine immunizations across Europe, fueling a concerning resurgence in preventable diseases such as measles, according to reports published by public media and health authorities.
Measles Resurgence and Vaccination Gaps in Europe
Public health authorities across Europe face a renewed threat from measles as vaccination rates remain below global targets. Data from the European Centre for Disease Prevention and Control (ECDC) shows 2,339 declared measles cases across Europe over a one-year period. Nearly three out of four infections involved individuals who were not vaccinated.
Stopping measles transmission requires a 95 percent vaccination coverage rate with two doses across the population. In 2023, only four European free-trade area countries reached that threshold for the second dose. Belgium, for instance, recorded a 96 percent coverage rate for the first dose but only 82 percent for the second dose.
While multiple factors drive this resurgence—including complex access to care for vulnerable populations and missed routine appointments—disinformation significantly amplifies these vulnerabilities. According to data cited by the Belgian public broadcaster RTBF, online falsehoods plant seeds of doubt regarding vaccine necessity and public health transparency, pulling hesitant individuals away from institutional medical guidance.
The Spread of Anti-Vaccine Narratives Online
Misinformation networks built during the COVID-19 pandemic continue to influence routine childhood immunizations. An analysis of 440 posts from the Facebook group Antivax Portugal in 2020 revealed that nearly half constituted conspiracy theories capable of swaying hesitant users, as detailed in reports covering European health trends.
The European Observatory on Health noted that populations with limited health literacy or pre-existing institutional distrust bear a disproportionate burden, widening existing health disparities. Furthermore, a study published in 2025 in the journal Human Vaccines & Immunotherapeutics warns that pandemic-era mistrust has bled into routine childhood vaccinations, raising the risk of resurging diseases like diphtheria and polio.
Foreign Interference and Political Capital
Authorities in several Central and Eastern European countries report that anti-vaccine narratives are being amplified by campaigns originating from Russia. In Bulgaria, amid a measles outbreak in March 2026, then-Minister of Health Mihail Okoloyski identified countering vaccine misinformation as a top priority for containing the virus. Simultaneously, the Bulgarian National Health Mediators Network reported an increase in active anti-vaccine social media profiles attempting to undermine public health containment efforts.
However, analysts caution against attributing every piece of misinformation to foreign state actors. False information often enters the mainstream organically, where imported narratives blend into local discourse. The European Digital Media Observatory (EDMO) documented the expansion of Children’s Health Defense—founded by Robert Kennedy Jr.—into Europe in 2023, noting that the organization established a legal structure in Belgium to host events promoting health skepticism.
Political utilization of these sentiments has also reached European legislative bodies. In October 2025, the “Make Europe Healthy again” movement—modeled after the American political slogan—launched at the European Parliament with backing from the Patriots for Europe far-right group. A 2025 study published in the scientific journal Vaccine confirms that populist opposition parties across Western Europe leveraged pandemic-era restrictions and COVID-19 vaccination debates to capture political capital.
Vaccination coverage requirements and risks of disease resurfacing
What vaccination coverage rate is required to stop measles?
Public health standards dictate that a population coverage rate of 95 percent with two doses is necessary to block the transmission of measles effectively.
Which diseases are health authorities most concerned about due to declining immunization rates?
Research published in Human Vaccines & Immunotherapeutics highlights measles, diphtheria, and polio as diseases at risk of resurfacing as pandemic-era skepticism affects routine pediatric vaccination schedules.
How do foreign networks influence European health debates?
Investigations by European authorities and organizations like EDMO show that foreign-backed narratives and U.S.-based advocacy groups establish local legal entities, organize regional events, and find alignment with domestic populist political factions to promote vaccine skepticism.
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