Health officials are urging increased vaccination against measles as the United States enters the final months of a significant outbreak year, with the CDC reporting 2,777 confirmed cases across the country as of August 20, 2026. This surge follows a period of heightened concern regarding infectious diseases, including an outbreak response initiated by the Utah Department of Health and Human Services in April 2026.
Rising National Case Counts
According to data from the CDC, the 2026 measles case count has already surpassed the total reported for the entire year of 2025, which saw 2,289 confirmed cases. Of the 2,777 cases confirmed in 2026, 94%—totaling 2,614 individuals—are associated with specific outbreaks. These outbreaks include 1,239 cases from clusters that began in 2026 and 1,375 cases linked to outbreaks that originated in 2025.
Impact Across Age Groups
The demographic breakdown of the 2026 cases highlights significant impact among younger populations. The CDC reports that 1,314 cases, or 47% of the total, have occurred in individuals aged 5 to 19 years. Additionally, 522 cases, representing 19% of the total, were reported in children under 5 years old. In the 20+ age group, there have been 931 confirmed cases.
Vaccination and Immunity Gaps
Vaccination status remains a critical factor in the spread of the virus. The CDC confirmed that 94% of the 2,777 cases reported in 2026 involve individuals who are either unvaccinated or have an unknown vaccination status. Only 3% of those infected had received one dose of the MMR vaccine, and another 3% had received two doses. This pattern mirrors the 2025 data, where 93% of cases were among unvaccinated or unknown status individuals.
Declining Kindergarten Coverage
Public health officials have expressed concern over declining vaccination rates among children. According to the CDC, MMR vaccine coverage among U.S. kindergartners has dropped from 95.2% during the 2019–2020 school year to 92.4% during the 2025–2026 school year. This decline leaves approximately 280,000 kindergartners at risk of infection. The CDC notes that maintaining a community vaccination coverage of more than 95% is necessary to ensure protection through community immunity.
Transmission and Prevention
The Utah Department of Health and Human Services has provided resources to help communities manage potential outbreaks. The department's guidance emphasizes that measles is a highly infectious virus that spreads through the air when an infected person coughs, sneezes, or speaks. The virus can be contracted simply by being in a room where an infected person has been present. The department notes that 9 out of 10 people exposed to the virus will likely become infected if they lack immunity from vaccination or a previous infection.
Symptoms and Complications
Clinical symptoms of measles typically begin with a fever, cough, runny nose, and red, watery eyes approximately 7 to 14 days after infection. This is often followed by a rash that typically starts as flat red spots near the hairline on the face before spreading to the rest of the body, including the neck, chest, belly, arms, legs, and feet. The rash may include raised bumps or become one connected area. Complications from the disease can include pneumonia and ear infections.
Community Preparedness Resources
As the 2026 school year progresses, health departments continue to offer resources for various settings. The Utah Department of Health and Human Services provides specific checklists and notification templates for K–12 schools, childcare facilities, summer camps, and employers to prepare for and respond to measles exposure. These resources aim to assist parents and guardians with vaccination requirements and notification of school exposure.
