--- title: "US Records Three-Decade High Measles Outbreak: CDC Confirms 4,852 Cases" description: "The US Centers for Disease Control and Prevention has confirmed 4,852 measles cases—the highest annual figure in over 30 years. 96% of those infected were unvaccinated, and 511 people were hospitalized." date: 2026-10-31T14:06:01.897Z lang: en url: https://xab.info/en/posts/us-record-measles-outbreak-cdc-4852-cases tags: [measles, usa, cdc, vaccination, public-health, epidemic] author: "Inna Kinsheva" publisher: "XAB.info" --- # US Records Three-Decade High Measles Outbreak: CDC Confirms 4,852 Cases ![Close-up of a red skin rash on the body representing measles symptoms during the US outbreak](https://xab.info/media/2026/10/31/ssha-rekordnaya-vspyshka-kori-cdc-4852-sluchaya/ssha-rekordnaya-vspyshka-kori-cdc-4852-sluchaya-1.webp) ## Key Points - CDC confirmed 4,852 measles cases in the US, a record for over three decades - 96% of infected individuals were unvaccinated or had an unknown vaccination status - 511 patients (11%) were hospitalized - 48 outbreaks recorded; incidence rate is double that of 2025 - Experts link the surge to falling vaccination coverage and declining medical trust On October 30, 2026, the US Centers for Disease Control and Prevention (CDC) released updated data on the spread of measles across the country. According to the report, 4,852 cases of the disease have now been confirmed. Of this total, 4,834 cases were registered across 47 US jurisdictions, with another 18 identified among international travelers arriving in the United States. The 2026 morbidity rate is more than double the level seen in 2025 and, according to CDC estimates, is the highest in over three decades. ### Hospitalizations and Disease Severity Out of all confirmed cases, 511 patients were hospitalized, accounting for 11% of the total number of infections. According to the CDC, approximately 96% of cases involve individuals who were either unvaccinated or whose vaccination status could not be established. This highlights a direct correlation between a lack of immunization and the risk of severe illness. ### Outbreaks and Their Geography A total of 48 measles outbreaks were registered in 2026. Moreover, 90% of confirmed cases in the relevant sample (2,066 out of 2,289) are linked to outbreaks that began back in 2025. This indicates that the epidemic process has a cumulative nature and was not interrupted during the off-season. ### Causes: From Vaccination Rates to Trust According to CNBC, the spread of the virus reflects systemic issues: a decline in population vaccination rates, a drop in trust in medical institutions, and growing difficulties in persuading people to protect themselves, their families, and their communities. American media, citing expert opinions, note that the current outbreak is compounding the already severe strain on the country's healthcare system. ### Context and Outlook The record three-decade high measles incidence in US history underscores the vulnerability of herd immunity. Experts point out that without a sustained increase in vaccination coverage and the restoration of public trust in medical authorities' recommendations, the risk of further escalating outbreaks remains. The CDC continues to monitor the situation and update data as new confirmed cases come in. ## Fact-Check & Sources - [Число заболевших корью в США превысило 4800 человек.](https://www.vietnam.vn/ru/so-benh-nhan-mac-soi-o-my-vuot-4-800-ca) - Primary source: CDC data from Oct 30, 2026 — 4,852 cases, 47 regions, 511 hospitalizations, 96% unvaccinated, 48 outbreaks, 30+ year record. CNBC context on causes. ## FAQ ### How many measles cases were confirmed in the US as of October 30, 2026? The CDC confirmed 4,852 measles cases, of which 4,834 were registered in 47 US regions and 18 were identified among international travelers. ### What is the proportion of unvaccinated individuals among those infected? According to the CDC, approximately 96% of infected individuals were unvaccinated or had an unknown vaccination status. ### How many patients were hospitalized? 511 patients were hospitalized, representing 11% of the total number of confirmed cases. ### How does the current outbreak compare to 2025? The total number of cases in 2026 is more than double the figure for 2025, with 48 outbreaks recorded.