# Delaware's 4 new cases of measles meet criteria of "outbreak"

> **Newsylist Open Intelligence Dossier** · First detected: 2026-07-23 02:29 UTC · Category: Health · Sources: 7 · Current Velocity: 4.63

## Executive Summary
Delaware declares measles outbreak with 4 new cases

## Intelligence Brief
A measles outbreak has been declared in Delaware with 4 new cases reported.


Coverage from various outlets including WBOC TV, Newswise, and State of Delaware News emphasizes the rapid increase in cases and the declaration of an outbreak. The Delaware State Fair is also taking place as officials monitor the situation.


According to coverage, the outbreak was declared days after the first case was reported, and cases are also rising in neighboring Chester County, Pennsylvania.

## Verified Facts & Key Claims
### How many cases of measles are there in Delaware?
4 new cases

### What has been declared in Delaware due to the measles cases?
A measles outbreak

### Are cases of measles rising in neighboring areas?
Yes, in Chester County, Pennsylvania

## Key People, Organizations & Locations
Measles, Delaware, Kent County, Chester County Pa, Delaware Declares Measles Outbreak, Delaware State Fair, Top Epidemiologist and Professor Immediately Available, Discuss Measles Outbreak

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| WBOC TV | Delaware State Fair opens as officials monitor Kent County measles outbreak | 2026-07-23 04:57 | [Source Link](https://news.google.com/rss/articles/CBMi5gFBVV95cUxOZmR2Uy0tUnlwbTJucms3UnI1SXZEZ05PQ2ZRT3V1cUpZZ2doMl9wSnpXQW5BUUZkUldKUm5rRzd0RXRyVGxFeXc5Qk9qWk53RTlXR1hiU2NHR1VJaEIyVzFmbE1pMkFnYV9UOVhRV2plVWxYVVRTZVV1LU1lMlg0UFJhWWxUZFdaeTR2RmhOdkhUVUJPY2VkTWZrZTkxZHZsdXpFLWhva2MyaVAxemhQV09rUEJkaHNjTFVxTGZzQXljeEcwRWpHeFFpcWczR21oa0lHYjhrTEhnSTI4aVRMSTBielVsUQ?oc=5) |
| Newswise | Top Epidemiologist and Professor Immediately Available to Discuss Measles Outbreak | 2026-07-23 04:57 | [Source Link](https://news.google.com/rss/articles/CBMitwFBVV95cUxNVk5CWEFuNjN6YW56YzBqQWc3OHFRNkE5T3lCSk1ybEUyOVVETWp2SDVXT3JfNi1IZi1kclBkOVp2TTlQRkFOd3FWU2dERVhuakJvQnVGYkw0LVdYT2p1U2FLT0Z0ZHl3QUVyQzBrcDhnVzYwZU5MUy1YQ24xOVhfR1owbmU5WWhMd0pmMGFKRFlGdVZqVGpsLWlsSUFLVVBJOXVaZm5FTjhqaWg4SUp2VW5VRVpGN2_SAbcBQVVfeXFMTVZOQlhBbjYzemFuemMwakFnNzhxUTZBOU95QkpNcmxFMjlVRE1qdkg1V09yXzYtSGYtZHJQZDladk05UEZBTndxVlNnREVYbmpCb0J1RmJMNC1XWE9qdVNhS09GdGR5d0FFckMwa3A4Z1c2MGVOTFMtWENuMTlYX0daMG5lOVloTHdKZjBhSkRZRnVWalRqbC1pbEl) |
| State of Delaware News (.gov) | Delaware Declares Measles Outbreak | 2026-07-23 04:57 | [Source Link](https://news.google.com/rss/articles/CBMifEFVX3lxTFB5MEpUeUI2QXdYQ1V2WVR2TGU4VkVJVEZoVXVDVFJ6OHNvdWZhLV9zLWRnVGhpbWJhWUVBTWliUlZzX25UdVlwN1RXaVJpWlhhT0lPZklnT2VZS2dJTW5seFNpdjNCOXd0eUVYVkUzczdBUnRsR0ZIUnJmUkM?oc=5) |
| Spotlight Delaware | Delaware declares measles outbreak days after first case | 2026-07-23 04:57 | [Source Link](https://news.google.com/rss/articles/CBMinwFBVV95cUxOdDgteDhFTHJkX3RobTBEY21OTTFtdURyQ3FSUl9ZdXdUZ0l0Uy1NbU8tV2xPd01BUXMtYllZNlNSbHAzRXNaWkhUemlNNl9CdjQycmxPOTlmTHVrOF9mbjIwOWd2YVFFVWJtSHFVME1FOHVmQnJSZzZSdDZEaHMtLVZ1R1pVemFoMnJpOHFxSXJKeTNfb0NCWnpMblJpRkk?oc=5) |
| WHYY | Delaware declares measles outbreak as cases quickly climb to 4 | 2026-07-23 03:31 | [Source Link](https://news.google.com/rss/articles/CBMiYkFVX3lxTE42S0czbzVMOTBSbVlYdzZ4XzRCZnJXMGRqaGFCU3YtdWM4OFNqX1FjaTN5dEtKd01pYWRYZFc0M3o0STNNSXk5dEpKOTZEQ0hMZFBSemZVNjIwMVNaLXl1UVVB?oc=5) |
| 6abc Philadelphia | Measles outbreak declared in Delaware; cases also rising in Chester County, Pa. | 2026-07-22 19:38 | [Source Link](https://news.google.com/rss/articles/CBMingFBVV95cUxQQzNaZ3FmbEUwbGJ3Znl6LUctUkM2S2hiMGZINUE5QkdVTF9McGdoclZoZGREWEtZSkVDcUlNbnduQnFSc0d0ZGhqVGpxd050TFU1SW1LQ1owMVgzUUtzQWUwa3ZucUw2b3NXZXFZSzFwZ1lnNHpuZmR3MEpYWXR2VV9ERHJzTE01Z3dhNGpyVDVSQ2RvRFJESWVTTHUyQdIBowFBVV95cUxQOG1HX0ttZnJXak5ENUFTUUNBaEpsZmF6ZnFNWVU4TDVmRmcxWUhQVnA5eGtaZ09fck1NYVVidTZ2N2dVc3FuTkI0Z2c1d2xObnRLeGhzRFE4TzFVSGE3TVlnN1EwNmJXNjJHbWQ3UnR0TVVWME9XY0ZfYlJBM3BJaDEwSGpjYTBnZXA4Sl96cHg3UkpmcjVSbXBtV0VTUndtWF9z?oc=5) |
| WDEL | Delaware's 4 new cases of measles meet criteria of "outbreak" | 2026-07-22 19:38 | [Source Link](https://news.google.com/rss/articles/CBMizwFBVV95cUxOaHdJa19wT0djanVTRFFoZXRfRDdWRGtNVWYyVjliLWdkbWNxU1lXTUN5M1UwUnQ2TlE0elB0aXlKbm1GbFM1RC1kbl9VT3YxVHlTRlU2UURFYzNLQW9rOEJuTmUzZnlqa2dEYzdXZFp5cE1jZ3NhaGpQVmVSU3JwVktEMHNrVzI0dkdiVlNvNndfdkVidUgzOGdNeHBfNXpTckh5YkJOMnNtUXBrMTItdVJGRFY4QzhsOTl2NUdKV3h0RnM3QWtkVWZ4N1FnYzA?oc=5) |

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*Canonical Source: https://www.newsylist.com/trend/2026-07-23/delaware-s-4-new-cases-of-measles-meet-criteria-of-outbreak*
*Synthesized by Newsylist Open Intelligence Engine under E-E-A-T journalistic standards.*