Active investigation

Latest report

Measles Cases in 2026

As of October 29, 2026, 4,852 confirmed measles cases were reported in the United States, with 4,834 cases reported by 47 jurisdictions and 18 cases among international visitors. Of these, 96% (4,666 cases) were outbreak-associated, including 3,282 from outbreaks starting in 2026 and 1,384 from outbreaks that began in 2025. The U.S. has seen a rise in measles activity due to declining MMR vaccination coverage among kindergartners, which dropped to 92.4% in the 2025–2026 school year, and increased global measles transmission. Measles remains eliminated in the U.S., but outbreaks occur when the virus is introduced by unvaccinated travelers and spreads in communities with low immunity.

Status as published: Ongoing

Freshness and lifecycle

• First seen: September 18, 2026
• Last seen: October 31, 2026
• Published by source: October 29, 2026
• Last updated by source: October 29, 2026
• Lifecycle status: Latest report
• View the official source record

Not sure what "Active investigation" means? See surveillance updates, advisories, and confirmed outbreaks.

Diseases

• Measles

Locations

• Alabama
• Alaska
• Arizona
• California
• Colorado
• Connecticut
• Delaware
• District of Columbia
• Florida
• Georgia
• Idaho
• Illinois
• Indiana
• Iowa
• Kansas
• Kentucky
• Louisiana
• Maine
• Maryland
• Massachusetts
• Michigan
• Minnesota
• Missouri
• Montana
• Nebraska
• New Jersey
• New Mexico
• North Carolina
• North Dakota
• Ohio
• Oklahoma
• Oregon
• Pennsylvania
• Rhode Island
• South Carolina
• South Dakota
• Tennessee
• Texas
• Utah
• Vermont
• Virginia
• Washington
• West Virginia
• Wisconsin
• Wyoming

Official guidance and record verification

Public Health Trace does not provide medical advice. The information below explains how to interpret this record and links to relevant official government sources. Review the linked official source for the current, authoritative information.

Public Health Trace does not display record-specific recommendations for this record. Review the linked official source for current, authoritative information.

View the official CDC source record

Version history

Every version of this record, oldest first -- earlier reported values remain visible even after a newer update supersedes them.

1. September 17, 2026 - Measles cases in 2026
2. September 17, 2026 - Measles cases in 2026
3. September 24, 2026 - Measles cases in 2026
4. September 24, 2026 - Measles cases in 2026
5. September 24, 2026 - Measles cases in 2026
6. May 8, 2026 - Measles cases in 2026
7. October 8, 2026 - Measles cases in 2026
8. October 8, 2026 - Measles cases in 2026
9. May 8, 2026 - Measles cases in 2026
10. October 22, 2026 - Measles cases in 2026
11. October 22, 2026 - Measles Cases in 2026
12. October 29, 2026 - Measles Cases in 2026 (current)

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