Jalisco emerges as active epicenter of Mexico’s measles outbreak
Mexico is facing its largest measles outbreak in decades, with the highly contagious virus now confirmed in every state. However, the focal point of active transmission has shifted decisively to Jalisco, which has registered 385 new cases in the first 20 days of 2026 alone—more than half of the national total for the period and making it the state with the highest number of new infections this year.