Vomiting virus is spreading across most of the U.S.
Norovirus is currently spreading across much of the United States, particularly affecting hikers on the Pacific Crest Trail in Southern California. Wastewater data indicates high levels of the virus in various states, with a notable increase in the Northeast. While national levels are not unusually high compared to previous seasons, the virus remains a concern due to its highly contagious nature.
- ▪Hikers along the Pacific Crest Trail have reported outbreaks of norovirus.
- ▪Wastewater surveillance shows rising levels of norovirus across many states, especially in the Northeast.
- ▪The CDC recorded 1,194 outbreaks of norovirus from August 1 to May 7, which is consistent with past averages.
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| Original publisher | NBC News — Top |
| Canonical URL | https://www.nbcnews.com/health/health-news/norovirus-gastrointestinal-symptoms-spreading-us-wastewater-rcna347108 |
| Publication time | Fri, 29 May 2026 09:00:00 GMT |
| Retrieval time | 2026-05-29T09:14:59.781Z |
| Last seen | 2026-05-29T09:14:59.781Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | Bet3a6yUOIUv |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Health newsVomiting virus is spreading across most of the U.S.Hikers along the Pacific Crest Trail in Southern California have been hit with norovirus, but they’re not the only ones suffering. Wastewater data shows high levels in many states.Listen to this article with a free account00:0000:00Southbound hikers walk toward Pinchot Pass on the Pacific Crest Trail in California.David Madison / Getty Images fileShareAdd NBC News to GoogleMay 29, 2026, 5:00 AM EDTBy Shiv Sudhakar, M.D.Flu season may be mostly behind us, but a nasty, highly contagious stomach bug is rising.Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content.In recent weeks, hikers in Southern California have been hit with norovirus, according to the Pacific Crest Trail…
Excerpt limited to ~120 words for fair-use compliance. The full article is at NBC News — Top.
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