COVID-19, influenza, RSV and norovirus

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.
Norovirus and the 'quad-demic': What to know
The norovirus (commonly known as stomach flu) is surging with levels not seen in more than a decade. Public health officials are warning that we might soon have a "quad-demic" on our hands.
What Is Quad-Demic? Flu, COVID, RSV And Norovirus Strain Hospitals In UK, US
Health experts are warning of a 'quad-demic' this winter, as four viral infections spread simultaneously in the UK and US.
Flu, RSV, and Norovirus Are in Full Swing, While COVID Looms
Most U.S. states are reporting high or very high flu-like activity, while COVID-19 rates remain lower than this time last year.
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 Control and Prevention (CDC) data.
Experts warn of a ‘quad-demic’ as flu, RSV, COVID-19 and norovirus converge in California
After the holiday season and an uptick in travel, California faces a rise in respiratory illnesses, prompting health experts to talk of a “quad-demic.” The term refers to the simultaneous spread of four major viruses: COVID-19,
What Is the ‘Quad-demic’ — and Is It Coming for You?
Care for the flu is generally supportive — meaning rest, hydration, and over-the-counter medication, but as the Mayo Clinic ...
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What’s Going Around Right Now? The 4 Winter Viruses of the ‘Quad-Demic,’ Explained
COVID-19, influenza, RSV, and norovirus—have created what experts are calling a "quad-demic" in the U.S. Here's what to know ...
Twin Cities senior living facility quarantines patients to prevent spread of norovirus as hospitals strained with "quad-demic"
As illness is spreading around the state, one patient says their senior living facility is keeping residents separated to ...
Norovirus Outbreak Sickens 28 at Calif. Shelter Housing L.A. Fire Evacuees
The virulent illness spreads easily in close quarters, causing diarrhea, vomiting and stomach pain An outbreak of norovirus — ...
Tracking the ‘quad-demic’
Cook your food thoroughly (especially seafood and shellfish) to at least 145 degrees Fahrenheit. Clean and sanitize surfaces ...
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What to know about 'quad-demic' of COVID, flu, RSV and norovirus
Four viruses are currently circulating in the United States, which some have referred to as a "quad-demic ... and RSVand the gastrointestinal disease norovirus. Emergency department visits ...