Overview of the Measles Crisis in Mexico
As of January 23, according to the latest data from Mexico’s Health Secretary, the country has recorded 987 confirmed measles cases, bringing the total to 7,417 infections nationwide. The situation has escalated from prevention to emergency as the first measles-related death in Michoacan was confirmed, adding to the 25 fatalities reported in 2025 and raising the total to 26 during the current outbreak period.
Measles Activity Across Regions
The virus is currently active in 32 regions, with 265 municipalities bearing the brunt of the disease. The states with the highest incidence are Jalisco (521 cases), Chiapas (200 cases), and Sinaloa (65 cases).
International Assessment: OPS Scrutinizes Mexico
For the first time since 2016, Mexico faces the real risk of measles becoming an endemic disease. The Pan American Health Organization (PAHO) has issued a warning placing Mexico under international evaluation.
Mexico and the United States will present before the Regional Commission for Monitoring and Verification in a virtual meeting on April 13. If interrupted transmission of the same virus strain is confirmed for over 12 months, Mexico will officially lose its status as a measles-free nation, a certification it has held for a decade.
Vaccination Efforts and Age Criteria
Doctors Agustín De Colsa Ranero, Miguel Ángel Minero Hibert, and Sandra Rajme López explained during the CuidArte art exhibition opening that the institutional response has intensified to prevent loss of the health status. They mentioned that due to the virus’s high contagiousness, early vaccination from 6 months of age (instead of the usual one year) has been authorized. The current focus prioritizes individuals aged 20 to 49, who have low immunity levels (around 70%).
Three dates for the National Vaccination Campaign have been set, and active brigades are operating in high-traffic areas like Mexico City’s Metro.
“The situation is completely alarming due to the contagious nature of the disease, which is preventable through vaccination. The message to the public is to review their vaccination records; if they lack two doses of the triple viral vaccine, they should get vaccinated,” said Minero Hibert to El Economista.
“Remember that these outbreaks are dynamic situations… virus transmission is very fluid, and we must adapt to how it behaves. The age cutoff for vaccination isn’t primarily about vaccine safety but the epidemiological zero measles cases; we aim for 95% or higher coverage. That’s why adults, despite being vaccinated as children, should get a booster dose,” added Colsa Ranero.
Delayed Demonstration and Ongoing Challenges
Although the initial deadline for demonstrating transmission interruption was January 20, Mexico requested a two-month extension from PAHO. The challenge remains significant: controlling virus circulation in the 32 active regions before the April review.
Experts emphasize that achieving a vaccination coverage above 95% is the only way to stop deaths and regain stability. “PAHO’s resolution isn’t an administrative procedure; it signals that measles could become a persistent threat, increasing the risk of severe complications for thousands of Mexicans,” they concluded.
Key Questions and Answers
- What is the current measles situation in Mexico? As of January 23, there are nearly 1,000 cases in a month, with 26 fatalities reported.
- Which states are most affected by measles? Jalisco, Chiapas, and Sinaloa have the highest incidence rates.
- Why is Mexico under international evaluation by PAHO? There’s a risk that measles could become endemic, threatening Mexico’s measles-free nation status.
- What are the new vaccination guidelines? Early vaccination from 6 months of age is authorized, with a focus on adults aged 20-49 due to low immunity levels.
- What is the challenge facing Mexico? Control virus circulation in 32 regions before the April review to maintain measles-free nation status.
- What coverage is needed to stop the outbreak? Achieving a vaccination coverage above 95% is crucial to prevent further deaths and stabilize the situation.
