The 2026 U.S. measles case thresholds represent critical public health monitoring points, with prediction markets tracking whether confirmed cases will reach 3,000, 4,000, 7,500, or 10,000 by year's end. These four linked markets allow participants worldwide to assess the likelihood of different outbreak severity levels as epidemiological data accumulates throughout the year. Measles is a highly contagious viral infection that typically presents with fever, cough, and a characteristic rash. While the disease was nearly eliminated in the U.S. by 2000, periodic resurgence has occurred in recent years due to declining immunization coverage in specific regions and international travel. Each threshold tracked here represents a meaningful inflection point—from endemic baseline levels through progressively severe outbreak scenarios—that carries distinct implications for public health response and resource allocation. The price of each market reflects the collective forecast of thousands of participants globally. A higher market price on a given threshold indicates broad expectation that the U.S. will exceed that case count; conversely, a lower price signals skepticism about reaching that level. The spread between adjacent thresholds reveals market confidence in intermediate outcomes: a narrow spread suggests genuine uncertainty about where cases will ultimately land, while a wider spread indicates clearer market consensus about severity gradations. As you review the prices, note that prices typically adjust with epidemiological reports, vaccination coverage data, travel patterns, and seasonal trends. When regional outbreaks occur, prices move across all four thresholds, though higher thresholds representing more severe scenarios typically experience larger percentage swings. The 3,000-case threshold, being the easiest to reach, typically carries a higher price than the 10,000-case threshold in most market environments. These prediction markets serve as real-time risk assessment instruments for epidemiologists, public health officials, healthcare planners, and researchers monitoring disease trajectory and outbreak severity throughout 2026.