Measles Activity in California, 2025
In 2025, 25 confirmed measles cases were reported. The affected jurisdictions were:
- Contra Costa
- Fresno
- Long Beach
- Los Angeles
- Orange
- Placer
- Riverside
- Sacramento
- San Diego
- San Luis Obispo
- San Mateo
- Santa Clara
- Tulare
- Tuolumne
- Yolo
January 2025
| 0
|
February 2025
| 3
|
March 2025
| 6
|
April 2025
| 2
|
May 2025
| 2
|
June 2025
| 4
|
July 2025
| 2
|
August 2025
| 1
|
September 2025
| 1
|
October 2025
| 1
|
November 2025
| 1
|
December 2025
| 2
|
These data are provisional and subject to change.