US loses measles-free status: Pan American Health Organization

The Americas has lost its measles-free status after endemic transmission was reestablished in Canada, where the virus has circulated for at least 12 months, according to the Pan American Health Organization. As of November 7, 2025, over 12,500 confirmed measles cases have been reported across ten countries with 28 deaths, representing a 30-fold increase from 2024, primarily affecting unvaccinated or under-vaccinated populations. PAHO emphasized that while this loss is a setback, it is reversible through sustained vaccination efforts and regional cooperation.