Polio Vaccine: Europe Travel & Outbreak Risk

Polio Risk Rises: WHO Warns of Lowest European Vaccination Rates in years

A concerning decline in polio vaccination rates across Europe has left over 450,000 infants vulnerable,prompting a new warning from the World Health Institution (WHO) and a travel advisory from the U.S. Centers for Disease Control and Prevention (CDC). The resurgence of the virus in multiple regions underscores the critical importance of global immunization efforts.

Declining Immunization Coverage Fuels Concerns

In 2024, polio vaccination rates in Europe experienced a significant decrease, leading to a heightened risk of outbreaks. “Gaps in immunization coverage make children vulnerable and pose a health security risk to our region and beyond,” stated a senior official with WHO’s European office on October 24, 2025. This decline comes at a time when the virus is also being detected in othre parts of the world, raising fears of a wider resurgence.

Did you know? – Polio is a highly infectious disease that primarily affects children under five. It can cause irreversible paralysis. Vaccination is the most effective way to prevent infection.

New Polio Cases Confirmed Globally

The WHO’s warning coincides with the confirmation of new polio cases in Afghanistan and Papua New Guinea (PNG), as reported by the Global Polio Eradication Initiative. In Afghanistan, two individuals were recently infected with wild poliovirus type 1 (WPV1), bringing the country’s total for 2025 to nine cases. The onset of paralysis in these patients occurred in early October.

Simultaneously occurring, PNG has reported two cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) in its Central and Enga provinces, with paralysis beginning in August. PNG has now confirmed three cVDPV2 cases this year.

Pro tip: – Even with high vaccination rates, vaccine-derived poliovirus can emerge in under-immunized populations. Continued surveillance and vaccination are crucial.

Poliovirus Detected in European Wastewater

Adding to the concern, poliovirus type 2 has been detected through routine wastewater surveillance in six European countries – Finland, Germany, Israel, Poland, Spain, and the United Kingdom – as September 2024. This finding suggests the potential for undetected transmission within these regions.

Global Response and Travel Advisory

WHO/Europe, in collaboration with other partners in the Global Polio Eradication Initiative (GPEI), is actively supporting national and local public health authorities. These efforts include investigations, monitoring, strengthening immunization programs, and rapid response to virus detections to prevent further spread.

To protect international travelers, the U.S. CDC issued a Travel Health Notice in 2025, listing 39 countries with a polio risk. The CDC strongly advises all travelers to these areas to ensure they are fully vaccinated before their trips.

The situation highlights the ongoing need for vigilance and sustained investment in polio eradication efforts worldwide. The interconnectedness of global travel means that outbreaks in one region can quickly pose a threat to others, emphasizing the importance of extensive immunization coverage for all.

Reader question: – What role do you think misinformation plays in declining vaccination rates, and how can public health officials address it?

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Expanded News Report:

Why is this happening?

Polio cases are rising globally due to declining vaccination rates, particularly in Europe, and the emergence of both wild poliovirus and circulating vaccine-derived poliovirus (cVDPV). A decrease in immunization coverage creates vulnerabilities, allowing the virus to spread more easily. Wastewater surveillance in Europe has revealed the presence of poliovirus, indicating potential undetected transmission.

Who is affected?

The most vulnerable population is infants and young