More news on this day
The Centers for Disease Control and Prevention has issued a new global polio travel alert covering 32 countries across Europe, Africa and the Middle East, urging international travelers to review their vaccination status as health authorities track ongoing poliovirus circulation in wastewater and communities.
Level 2 Travel Health Notice Targets 32 Countries
The CDC’s latest advisory, posted this week as a Level 2 “Practice Enhanced Precautions” notice, reflects continuing detections of both wild poliovirus and circulating vaccine-derived poliovirus in multiple regions. While the United States remains polio free, health officials warn that international travel can easily reintroduce the virus into under-immunized communities.
The updated list includes destinations popular with American travelers, among them several European countries where poliovirus has been picked up in wastewater despite no recent paralytic cases. It also extends across parts of North, West and Central Africa and into the Middle East, where gaps in routine childhood immunization and conflict-related disruptions have left pockets of susceptible children.
Under the Level 2 notice, the CDC is not advising against travel, but strongly recommending that all travelers be fully vaccinated against polio according to age and risk. For some visitors to higher-risk destinations, an additional single lifetime booster dose of inactivated polio vaccine may be advised, particularly for those who will be staying for longer periods or working in health care or refugee settings.
The advisory follows months of surveillance data showing ongoing poliovirus detections despite major progress toward global eradication. It underscores how quickly the virus can cross borders when immunity levels fall, even in countries that have not seen a paralytic case in decades.
Wastewater Detections Keep Europe on Alert
Europe remains officially polio free, but environmental surveillance has repeatedly detected poliovirus in sewage systems in several countries. Health authorities in Germany, the United Kingdom, Spain, Finland, Poland and Israel have all reported variant or vaccine-derived poliovirus in wastewater samples over the past two years, prompting targeted vaccination drives and public reminders on routine childhood shots.
These findings do not necessarily mean widespread community illness, but they do signal that the virus is being imported by travelers and can circulate quietly among under-immunized groups. Because fewer than 1 percent of infections cause paralysis, poliovirus can spread extensively before a clinical case is recognized, making wastewater monitoring a critical early warning tool.
Travel experts say the inclusion of European destinations in the CDC’s polio travel alert may surprise vacationers who associate the disease only with lower-income countries. Public health officials, however, stress that the advisory is driven by surveillance, not stigma, and is intended to prevent rare detections from evolving into outbreaks.
National immunization programs across Europe have been working to close coverage gaps that widened during the COVID years, when routine childhood vaccinations were often delayed. Authorities emphasize that maintaining high polio vaccine coverage is the best way to keep the region free of paralytic disease even as international travel rebounds.
Africa and the Middle East Confront Ongoing Transmission
In Africa and the Middle East, the advisory reflects both historic vulnerabilities and recent progress. Wild poliovirus transmission has been largely confined to Afghanistan and Pakistan, but outbreaks of circulating vaccine-derived poliovirus have affected countries across sub-Saharan Africa and parts of the Arabian Peninsula and Levant in recent years.
Ministers of health from across the African continent reaffirmed their commitment in 2025 to finish the “polio endgame,” including stronger cross-border surveillance and rapid response to any new detections. Yet large, mobile and conflict-affected populations, particularly in the Sahel and Horn of Africa, continue to complicate vaccination campaigns and leave some communities unreached.
In the Middle East, a combination of displacement, damaged health systems and insecurity has created conditions for poliovirus to persist or reappear. Ongoing circulation of vaccine-derived poliovirus in parts of Yemen and Gaza, along with environmental detections in neighboring countries, has heightened concerns about regional spread amid heavy cross-border travel.
The CDC advisory highlights these realities for travelers, emphasizing that even short visits to affected areas can bring visitors into contact with poliovirus, especially where sanitation is poor or vaccination rates are low. Health agencies across the region are urging both residents and visitors to ensure they are up to date on polio vaccination schedules.
What the Advisory Means for U.S. Travelers
For American travelers planning trips to affected countries in Europe, Africa or the Middle East, the advisory’s main message is to check vaccination records early. Children should complete the standard inactivated polio vaccine series, while adults who were vaccinated in childhood are generally considered protected but may be advised to receive a single lifetime booster if traveling to areas with active poliovirus circulation.
Travel medicine specialists recommend scheduling pre-trip consultations at least one to two months before departure, allowing time to review routine and destination-specific vaccines. For some long-term travelers to polio-affected countries, local authorities may require proof of recent polio vaccination, especially for those staying more than four weeks, in line with international health regulations.
The advisory also reminds travelers to practice meticulous hygiene in destinations with poliovirus circulation. Because polio spreads primarily via the fecal-oral route, careful handwashing, safe food and water practices and attention to sanitation are simple but important layers of protection alongside vaccination.
Experts stress that the advisory should not deter travel, but rather encourage informed planning. The costs and logistics of pre-travel health visits can be significant, especially for families and long itineraries, but clinicians note that the risk of importing poliovirus is far lower when travelers are fully vaccinated.
Eradication in Sight, but Vigilance Remains Essential
The CDC’s latest alert comes as global health agencies insist that polio eradication is within reach, yet warn against complacency. Wild poliovirus remains endemic in only a small number of districts globally, and many African and Middle Eastern countries have achieved or maintained polio-free status. However, as long as any form of poliovirus continues to circulate, every country remains at some level of risk.
Surveillance has become increasingly sophisticated, linking clinical case tracking with environmental testing of wastewater and expanded laboratory capacity. These systems have detected poliovirus in places that had seen no paralytic cases for years, allowing for focused vaccination campaigns before major outbreaks take hold.
Travelers are an important part of this picture. By staying current on vaccinations and seeking up-to-date advice before departure, they help protect both themselves and the communities they visit and return to. Health officials say that the new advisory is a reminder that the final steps toward eradication depend on maintaining high immunity everywhere, not only in places perceived as high risk.
For now, international trips to affected parts of Europe, Africa and the Middle East can continue largely as planned. The expectation from health authorities is that travelers will treat polio prevention as a standard element of travel preparation, alongside passports, tickets and insurance, until the virus is finally consigned to history.