Vomiting virus is spreading across most of the U.S.
Source: nbc
May 29, 2026, 4:00 AM CDT By Shiv Sudhakar, M.D.
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Recent wastewater surveillance reveals an upward trend to “high” levels of norovirus across much of the country, with rates currently rising in the Northeast.
From Aug. 1 to May 7, the Centers for Disease Control and Prevention’s NoroSTAT program recorded 1,194 outbreaks, compared with 2,534 during the same period the previous year — consistent with past averages.
“At the national level, norovirus is still in the HIGH category due to high concentrations over the last 21 days,” Amanda Bidwell, the scientific program manager at WastewaterSCAN, an academic program through Stanford University in partnership with Emory University, said in an email.
Norovirus is often called the “winter vomiting disease,” but it’s not unusual for outbreaks to continue through late spring, Bidwell said.
The wastewater numbers also highlight an outbreak of norovirus in the San Francisco Bay Area, although the numbers nationwide are average for this time of year, said Dr. Linda Yancey, an infectious disease specialist at Memorial Hermann in the Houston area......................
Read more: https://www.nbcnews.com/health/health-news/norovirus-gastrointestinal-symptoms-spreading-us-wastewater-rcna347108?utm_source=firefox-newtab-en-us
Vomiting virus is spreading across most of the U.S.
— (@oceancalm.bsky.social) 2026-05-29T15:04:12.734Z
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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.
Pacific Crest trail.Southbound hikers walk toward Pinchot Pass on the Pacific Crest Trail in California.David Madison / Getty Images file
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