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.
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 is seeing a rise in respiratory illnesses, prompting health experts to talk of a potential “quad-demic.” The term refers to the simultaneous spread of four major viruses: COVID-19,
Where are COVID, flu and RSV cases rising in the US? See maps
Influenza A, COVID-19 and norovirus (stomach flu) are on the rise, according to the Centers for Disease Control and Prevention. But there's a fourth "bug" the public should be aware of: respiratory syncytial virus. RSV causes cold-like symptoms and affects the breathing passages and lungs.
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.
As the flu rises in California, the difference between COVID, RSV, Norovirus, influenza
Flu season is here in California, but other illnesses are in full swing in the Golden State. Here are the symptoms and how long you're contagious.
Cases of RSV, flu, COVID, and norovirus are on the rise as winter ‘sick season’ arrives
This fall saw an unusually high number of cases of “walking” or mycoplasma pneumonia, a mild pneumonia that typically causes a severe cough but less fatigue than more serious forms of the disease.
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.
We're in flu season. What are symptoms? How to tell it's not another virus
Over 160,000 people this season have landed in the hospital from flu complications, CDC estimates. More than 6,600 have died.
How to protect yourself from norovirus, COVID-19, flu and RSV during the winter surge
There’s no medication for norovirus. Instead, you’ll need to rehydrate as much as possible with water and other liquids. Seek ...
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Flu, COVID, RSV spike strains Rochester hospitals, some at 150% capacity
The rise in flu, COVID-19, and RSV cases is putting a strain on local hospitals, which are operating well beyond their ...
What virus is going around? RSV, flu and COVID-1 cases rise in Tennessee and nationwide. What to know
State and federal data show high levels of respiratory illnesses. Here's what to know about the illnesses circulating this ...
Flu and RSV cases are still high in Florida. Here are the latest numbers
Florida is seeing a “very high” amount of activity as new variants of viruses are going around, most notably the flu ...
Alabama among the worst in the nation for flu, COVID and RSV, health officials say
Despite a recent 19% decrease in emergency department visits, health officials anticipate that Alabama's flu activity will ...
PeaceHealth emergency room is getting flooded with patients with flu, RSV
Over the last couple of weeks, emergency rooms at PeaceHealth Southwest Medical Center in Vancouver have been seeing a record number of patients.
Prisma Health limits visitors under 16 to curb rising flu and RSV cases statewide
As flu and other respiratory illnesses like (RSV) cases continue to rise across the state, Prisma Health has announced ...