‘I was violently ill': Doctors warn about dangerous symptom amid norovirus outbreak Health officials are raising alarms about a significant increase in norovirus cases nationwide, including here in North Texas. Alanna Quillen NBC 5 Dallas-Fort Worth

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Viral sicknesses rise amid ‘quad-demic’ in US Viral sicknesses have risen in early 2025 amid the ongoing “quad-demic” in the U.S., referring to three respiratory viruses and one gastrointestinal disease, according to the Centers for Disease Co… fimotija The Hill

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The number of people that have caught COVID-19, influenza or Respiratory syncytial virus (RSV), along with norovirus, has gone up, CDC said in the new Friday update.

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What to know about 'quad-demic' of COVID, flu, RSV and norovirus in US The U.S. is seeing a "quad-demic" as cases of COVID-19, flu, RSV and norovirus spread at the same time. Experts said this is what you need to know. ABC News ABC News

Four viruses are currently circulating in the United States, which some have referred to as a "quad-demic."

US respiratory disease markers remain high for flu, COVID, RSV Respiratory virus activity across the nation remains high, with COVID-19 levels rising across much of the country, flu indicators still elevated, and respiratory syncytial virus (RSV) activity very high in many regions, the US Centers for Disease Control and Prevention (CDC) said in its latest illness updates. CIDRAP

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Forty-three states are reporting very high or high flu activity, and of respiratory samples that tested positive for flu at public health labs, nearly 98% were influenza A. Of subtyped samples, 55.5% were H3N2, and 44.5% were 2009 H1N1.

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