Mexico is battling a significant resurgence of measles, with nearly 9,000 confirmed cases reported nationwide and 28 deaths as of February 17, 2026. The outbreak, which began in February 2025, is now active in all 32 states, prompting intensified vaccination and surveillance efforts from federal, local, and academic institutions. This marks a concerning reversal for the country, which had maintained measles elimination status from 1997 to 2019, with no local transmission between 1996 and 1999.
The current measles outbreak represents a serious public health challenge, particularly for vulnerable populations. According to health authorities, transmission remains active in 319 municipalities across Mexico. The majority of confirmed cases involve individuals who are unvaccinated or have incomplete vaccination records, highlighting the critical role of immunization in controlling the spread of this highly contagious disease. Understanding the factors contributing to this resurgence of measles in Mexico is crucial for effective intervention.
The outbreak’s initial epicenter was the state of Chihuahua, where between 4,493 and 4,505 cases were recorded between 2025 and 2026. While cases in Chihuahua have decreased in early 2026, the infection has spread to other regions. Currently, the state of Jalisco has the highest number of confirmed cases, followed by Chiapas, Sinaloa, and Mexico City. The distribution of cases underscores the need for a nationwide, coordinated response to prevent further spread.
Disproportionate Impact on Young Children and Young Adults
Epidemiological data reveals a concerning pattern in measles incidence. Infants under one year of age are experiencing the highest rates of infection, followed by children aged one to four, and five to nine. Notably, a significant proportion of cases are occurring in adults between the ages of 20 and 40. This suggests gaps in vaccination coverage across different age groups, potentially due to missed opportunities for immunization or waning immunity. The vulnerability of these age groups necessitates targeted vaccination campaigns.
Geographic Distribution of Fatalities
The 28 measles-related deaths reported to date are concentrated in specific states. Chihuahua accounts for the majority of fatalities, with 21 deaths recorded. Jalisco has reported two deaths, while Sonora, Durango, Mexico City, Michoacán, and Tlaxcala each have one fatality. Most of these deaths occurred in 2025, although cases were also reported in Michoacán and Tlaxcala in 2026. This geographic concentration of fatalities highlights the need for focused public health interventions in these areas.
National Vaccination Efforts Underway
In response to the escalating outbreak, Mexican health authorities have distributed 23.5 million doses of measles, mumps, and rubella (MMR) and measles-rubella (MR) vaccines nationwide. More than 11.8 million doses have been administered since the beginning of the epidemic. Vaccination campaigns include the routine two-dose schedule for children, a “zero dose” for infants aged six to eleven months, and a catch-up campaign for adolescents and adults up to 49 years old. These efforts aim to rapidly increase population immunity and curb the spread of the virus.
Historical Context and Re-emergence of Measles
The current outbreak represents a significant setback for Mexico’s public health achievements. The country had successfully eliminated measles transmission between 1996 and 1999 and maintained that status until 2019. The re-emergence of the disease underscores the importance of sustained vaccination coverage and robust surveillance systems to prevent future outbreaks. Factors contributing to the resurgence may include declining vaccination rates, increased travel, and the importation of cases from other regions.
Understanding the Risks and Prevention
Measles is a highly contagious viral infection that can lead to serious complications, including pneumonia, encephalitis (brain swelling), and even death. Symptoms typically include fever, cough, runny nose, and a characteristic rash. Vaccination is the most effective way to prevent measles and protect individuals and communities from its potentially devastating consequences. The Mexico Business News reports that authorities are working to address vaccine hesitancy and improve access to immunization services.
Health officials are urging residents to review their vaccination status and ensure they are up-to-date on their MMR or MR vaccinations. They also emphasize the importance of seeking medical attention if experiencing symptoms consistent with measles. Continued vigilance and proactive vaccination efforts are essential to control the outbreak and protect the health of the Mexican population.
The next official update on the measles outbreak in Mexico is expected from the Ministry of Health in early March 2026. Residents are encouraged to consult with their healthcare providers for personalized advice and to stay informed about the latest developments.
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