Measles vaccination gaps in Europe are back in focus after the United States warned that it could lose its measles elimination status. More than 4,500 cases have been reported in the US this year, roughly twice the total for last year. European health officials see the American surge as a warning about what happens when immunisation rates slip.

The European Centre for Disease Prevention and Control describes population protection in the EU as strong, yet not strong enough. First-dose coverage stands at 92% and second-dose coverage at 88%, compared with the 95% two-dose target that experts consider necessary to stop sustained spread. Those averages hide local pockets where coverage is lower, and that is where outbreaks take hold.

Measles spreads faster than almost any other infection, which magnifies every one of the measles vaccination gaps. Kitty Mohan of the Standing Committee of European Doctors says fifteen minutes of face-to-face contact with an infectious person is enough for someone unprotected to catch it. The virus lingers in the air, which means a single case in a school, a festival or a waiting room can reach dozens of people.

Recent European episodes show the pattern. At the Urkult festival in northern Sweden, held between 30 July and 2 August, health authorities counted 28 cases, including 12 secondary infections, but found no sustained spread. The ECDC treats that outcome as a success of rapid response rather than proof that measles vaccination gaps have closed. Most measles cases in Europe still occur in people who never received a vaccine.

Romania shows how measles vaccination gaps turn into outbreaks. The country recorded 30,692 cases in 2024, up from 3,371 in 2023. Across the wider European region, measles is endemic in 12 countries, and six of them, Armenia, Austria, Azerbaijan, Spain, the United Kingdom and Uzbekistan, have re-established endemic transmission. Large outbreaks in Bangladesh, Indonesia and Guatemala show how quickly the virus spreads where coverage falls.

The ECDC rates the risk as moderate for infants under 12 months, children aged one to five and immunocompromised people. It rates the risk as low to moderate for older unvaccinated children and adults. Infants are especially exposed because they are too young for the first dose, so they depend on the immunity of everyone around them.

The agency says that 2026 measles figures in the EU are lower than in 2025, although the data remain preliminary. That trend gives governments room to act before a larger wave arrives. Catch-up campaigns that target measles vaccination gaps among teenagers and young adults, school checks of vaccination records and outreach to communities with low trust in health services are the tools public health experts recommend most often.

For Brussels, the lesson is practical. The EU has no power to order national vaccination schedules, yet it can fund surveillance, support joint procurement and share best practice through the ECDC. Closing measles vaccination gaps will depend on national health ministries, and the next few months of reporting will show whether Europe moves toward the 95% target or follows the American example.