CDC Reports 2,318 U.S. Measles Cases in 2026, Most Since 1991, With Five Months Left in the Year

2,318 Cases, and Five Months of the Year Left

On Friday, July 24, 2026, the CDC posted new measles data. It showed 2,318 confirmed cases in the United States so far this year^[1][2]. That already tops the 2,289 cases recorded for all of 2025^[1][5]. More than five months of 2026 remain^[1][5].

It's the highest annual U.S. total since 1991^[1][3]. It's also the second record year in a row^[1][3].

Two states account for roughly half the cases. South Carolina has the most, with 670 confirmed cases in the same July 24 CDC dataset^[1][24]. Utah is second, with 522^[1][24]. Both outbreaks began in 2025 and carried into this year^[1][10].

The CDC says 93% of this year's cases were in people who were unvaccinated or whose vaccination status is unknown^[1][4]. About 7% of patients needed hospital care — 151 out of 2,318^[1][2]. No measles deaths have been reported in the U.S. so far in 2026^[1][2]. Three people died of measles in 2025: two children and one adult^[2][7].

Nobody disputes those numbers. What's contested is why the count climbed, and who should answer for it.

Cases Are Rising. A Different Number Is Falling.

Measles is the most contagious virus known to medicine^[8][14]. One infected person typically spreads it to 12 to 18 unprotected people^[8][14]. To stop a chain of infection on its own, a community needs roughly 95% immunity^[8][14]. Below that line, a single imported case can keep spreading for months.

National kindergarten coverage for the measles, mumps and rubella (MMR) vaccine sits at 92.5%, down from 95.2% in the 2019-20 school year^[13][14]. Nonmedical exemptions — religious or personal-belief opt-outs — hit a record 4.1% of kindergartners in 2024-25, about 138,000 children^[13][14]. The gap between 92.5% and the 95% threshold looks small on paper. In practice, it's the difference between an outbreak that fizzles out and one that runs for a year^[13][14].

The national average also hides where the real risk sits. Coverage can look fine overall while one county, school or community sits far below it^[12]. That's exactly where both of this year's large outbreaks took hold^[12].

At the same time, a different pair of CDC numbers is moving the other way. The share of patients needing hospitalization fell from 11% last year to 7% this year^[1][2]. Nobody has died of measles in the U.S. in 2026 so far^[1][2]. Cases are up. By these two measures, severity is down. Both facts come from the same CDC dataset, and neither side has much reason to highlight the other's number.

Two Outbreaks That Started Before This Year

South Carolina's outbreak was centered in and around Spartanburg County. It was declared over in late April 2026^[9][10]. Along the way, 33 schools reported exposures and 874 students were asked to quarantine over about six months^[9][11].

Utah's outbreak runs along the Utah-Arizona state line and has been active for more than a year^[1][25]. Roughly half of Utah's cases sit in the state's southwest health district, home to communities tied to the Fundamentalist Church of Jesus Christ of Latter-Day Saints^[10]. Advocates for those communities point out there's no religious teaching against vaccination there — just historically low uptake^[10].

Both outbreaks predate this year's fight over federal vaccine policy. That timing cuts both ways. It weakens the claim that this year's policy changes caused this year's record, since the outbreaks were already running in 2025^[1][10]. It also weakens the claim that nothing structural is wrong, since a chain of infection surviving a full year is itself the problem regulators watch for.

The Committee That Controls the Money, and the Test Set for November

Much of the political fight is really a fight over one obscure federal panel: the CDC's Advisory Committee on Immunization Practices, or ACIP^[19][26]. ACIP's recommendations decide which vaccines insurers must cover at no cost, and which ones the federal Vaccines for Children program buys for uninsured kids^[19][26]. Many state school vaccination rules are written to follow ACIP's list^[19][26]. Changing who sits on that committee isn't symbolic — it moves money and school policy.

Health and Human Services Secretary Robert F. Kennedy Jr. replaced ACIP members after taking office^[19][26]. Since then, the committee has struggled to gather enough members for a quorum to make any recommendation at all^[19][26]. In March 2026, a federal judge blocked part of Kennedy's broader vaccine-schedule overhaul, finding the process behind it "arbitrary and capricious"^[17]. Oregon's attorney general and other states have sued over the same changes^[18].

A separate, fixed date is already on the calendar. In November 2026, the Pan American Health Organization's Regional Verification Commission is set to decide whether the U.S. and Mexico still meet the standard for measles elimination^[6]. That standard isn't about the case count at all. It asks one narrow question: has a single genetic lineage of the virus circulated continuously in the country for 12 months or more^[6][7]? Genetic sequencing lets investigators tell whether new cases descend from an existing domestic chain or a fresh import from abroad.

The Americas region already lost its own verification in November 2025, after investigators found the virus had circulated in Canada for at least a year^[7]. The Utah-Arizona outbreak has already run longer than that^[1][25]. An independent analysis published earlier this year concluded the U.S. is "highly likely" to lose its own elimination status this fall^[8].

How Each Side Reads the Same Number

Democratic officials, many public health researchers and most national outlets read 2,318 as a scorecard on Kennedy. The New Republic stated it as settled fact in its headline: "RFK Jr. Now Responsible for 35-Year Record High in Measles"^[23]. Their case leans on the ACIP disruption, the court's "arbitrary and capricious" ruling, and the exemption and coverage data — real numbers, even where the causal claim is contested^{[13][14][17][23]}.

HHS disputes that the record belongs to Kennedy alone. A department spokesperson said Kennedy "has been clear that vaccination remains the most effective way to prevent measles infection," and pointed to more than $8.5 million sent to states and local partners, plus CDC staff surged to outbreak areas^[13]. Kennedy has separately said, repeatedly, that "if people don't want it, the government shouldn't force them to do it"^[16]. His allies argue mandates push already-distrustful communities away from the health system entirely, and that falling hospitalizations and zero deaths show the response is working even as cases climb^[1][2][16].

Medical-freedom advocates and families in the affected communities frame this as a fight over consent, not disease. Their strongest point isn't medical — it's that a parent accepting a small personal risk is exercising the same authority the law already gives parents over other medical decisions. In South Carolina's outbreak, 95.3% of patients were unvaccinated and 90.8% were 17 or younger^[9]: families making a choice for their own kids, as they see it, not imposing risk on strangers. Litigation to restore religious and personal-belief exemptions in states that repealed them is already underway^[19][29].

Health agencies say the rights debate obscures a cost that isn't abstract. Containing an outbreak is expensive even when nobody dies — South Carolina alone quarantined 874 students across 33 schools over six months^[9][11]. Agencies also want to preserve the U.S. elimination designation, both as a measure of their own performance and to protect immunization funding during a period of federal reorganization^[8][26].

Internationally, PAHO applies the same 12-month test to every country, and says its credibility depends on applying it consistently^[6][7]. It frames the U.S. as one part of a hemisphere-wide surge: as of November 2025, ten countries in the Americas had reported 12,596 confirmed cases combined, roughly 30 times the 2024 total, with 28 deaths — 23 in Mexico, three in the U.S., two in Canada^[7].

The Same Numbers, Read Differently by Outlet

Coverage of the July 24 data split sharply along familiar lines. CNN and The Washington Post led with the record and moved quickly to falling vaccination rates and the elimination review; the Post's version ran three days ahead of CDC's own posting, built on the Johns Hopkins tracker, with "months left in 2026" doing editorial work of its own^[1][3][5]. The New Republic went further, presenting Kennedy's personal responsibility as fact rather than a contested claim^[23]. Further left, the World Socialist Web Site described federal vaccine policy as an "assault," language that leaves little room for a good-faith version of the consent argument^[27].

On the right, One America News Network and Just the News ran short, data-only items built around the CDC figure and the 1991 comparison^[21][22]. Neither connected the numbers to falling MMR coverage or to Kennedy's policy changes — an absence that functions as its own kind of position. Al Jazeera, drawing on PAHO, treated the U.S. as one of three affected countries alongside Canada and Mexico, largely setting aside the American political fight^[20]. CIDRAP, a university-run public health outlet, led with the "highly likely" elimination forecast rather than the case count, treating vaccination decline as the operative cause without framing it as contested^[8].

None of that coverage changes what happens in November. The Regional Verification Commission won't be tallying up to 2,318 when it meets^[6]. It will be asking whether one chain of the virus has now circulated in the U.S. continuously for a full year. Along the Utah-Arizona line, it already has^[1][25].