Measles Surge in the Americas Prompts Urgent Call for Vaccination

• The Americas have recorded the highest number of measles cases in 22 years during 2026.
• Low immunization rates and mass travel during the FIFA World Cup are cited as the primary drivers of the outbreak.
• The Pan American Health Organization (PAHO) is urging nations to prioritize vaccination and epidemiological surveillance.

Current Outbreak Data

• Between January and August 2026, over 51,000 cases were reported, nearly triple the total from 2025.
• Guatemala, Mexico, the United States, and Peru account for 95% of the region’s cases.
• In the U.S., the CDC reported 3,471 confirmed cases and 39 outbreaks as of mid-September.

Vaccination Gaps

• 73% of registered patients were unvaccinated, with 85% of the regional population having received the required two doses of the MMR vaccine, falling short of the 95% threshold needed for herd immunity.
• Contributing factors to low coverage include access difficulties, growing vaccine hesitancy, and lack of awareness regarding health risks.

Public Health Strategy

• Experts, including specialists from the Brazilian Society of Vaccination, stress that vaccination is the most effective tool to prevent transmission.
• High-coverage countries like Brazil demonstrate that active surveillance and high immunization rates can successfully contain imported cases.
• PAHO continues to monitor affected countries, providing support to close vaccination gaps and strengthen rapid response mechanisms.