Will there be at least 10000 measles cases in the U.S. in 2026?

Prediction markets put the probability at 12%: Will there be at least 10000 measles cases in the U.S. in 2026. Currently, markets see this as unlikely (12% YES). 3 metro Atlanta family members test positive for measles, DPH says.

What’s Happening

Recent measles outbreaks in the United States and abroad have intensified public health scrutiny, with a key question emerging: will there be at least 10000 measles cases in the U.S. in 2026? As of late May 2026, the probability of this threshold being crossed stands at 12%, according to market data. This comes as health officials in Los Angeles County confirmed their fifth measles case this year on May 17, linked to international travel through Tom Bradley International Terminal. Simultaneously, the Georgia Department of Public Health reported three new cases in an unvaccinated metro Atlanta family on May 19, underscoring the virus's ability to spread rapidly among susceptible populations. These domestic clusters, while still relatively small in number, are occurring against a backdrop of declining vaccination rates that experts have long warned could lead to larger outbreaks [Los Angeles Times, May 17] [WSB-TV, May 19].

The global context adds significant weight to the question of whether there will be at least 10000 measles cases in the U.S. in 2026. A catastrophic outbreak in Bangladesh has already sickened more than 8,000 confirmed individuals, with an additional 60,000 suspected infections, and has resulted in over 500 suspected and confirmed deaths as of May 23. The New York Times reported on May 22 that the outbreak has prompted an emergency vaccination drive in the South Asian nation. Such large-scale international outbreaks increase the risk of imported cases reaching U.S. shores, as evidenced by the travel-related infections in Los Angeles and Atlanta. Public health experts have repeatedly warned that the erosion of herd immunity—driven by vaccine hesitancy and misinformation—creates conditions where even a single imported case can spark a chain of transmission in undervaccinated communities [New York Times, May 22] [Yahoo, May 23].

Looking ahead, the likelihood that there will be at least 10000 measles cases in the U.S. in 2026 depends on several dynamic factors. The current 12% probability reflects a baseline expectation that containment efforts will succeed, but the trajectory could shift if vaccination rates continue to decline or if additional large outbreaks emerge in undervaccinated U.S. communities. A May 21 Los Angeles Times opinion piece noted that "declining measles vaccination rates" are "playing out exactly as predicted" by epidemiologists, highlighting the real-world consequences of ignoring expert advice. Health authorities are now focusing on contact tracing, public vaccination campaigns, and monitoring international travel hubs. The coming months will be critical: if the summer travel season brings more imported cases and local transmission accelerates, the 10,000-case threshold—a number not seen in the U.S. since the early 1990s—could become a realistic scenario rather than a remote possibility [Los Angeles Times, May 21].

Traded on Polymarket — $6.5M Volume

Active market on Polymarket with $6.5M in total volume. Sufficient liquidity for most position sizes. Currently priced at 11c YES.