The United States reached 2,465 confirmed measles cases in 2026 as of August 6, per CDC surveillance data, the second consecutive year the national count has passed 2,000, a threshold never crossed between elimination in 2000 and the 2025 resurgence. Ninety-four percent of cases were outbreak-associated, the data show.
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What the 2026 numbers show
CDC data compiled for the August 6 update attribute the year's cases to 38 reported outbreaks and record hospitalization in roughly 7 percent of confirmed cases. Children and teenagers account for about two thirds of cases, with around one in five among children aged 5 and under, according to CDC figures cited in infectious-disease coverage. The count had already surpassed every year since measles was declared eliminated in 2000, and weekly updates through the summer showed the total still climbing.
Health departments in affected states have responded with contact tracing, isolation orders, and vaccination clinics, but importations tied to international travel continue to seed new clusters, per the CDC's assessment.
The resurgence has coincided with clusters in communities with low vaccination coverage, and the agency has repeatedly pointed to the two-dose MMR schedule as the most reliable protection, urging families planning international travel to check immunity first.
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What these figures can and cannot show
Surveillance totals capture reported and confirmed cases; under-detection means true infections are likely higher. Case counts measure transmission, not vaccine confidence directly, though sustained spread in communities with vaccination gaps is the mechanism behind the resurgence, per the agency's public statements. Hospitalization percentages can shift as data mature.
When to talk to a clinician
Two doses of measles-mumps-rubella vaccine prevent measles in about 97 percent of recipients, per the CDC. Adults unsure of their immunity can review records with a clinician; fever and rash after possible exposure warrant a call ahead before visiting a clinic, to avoid exposing others.