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.
Are your symptoms the flu, COVID, RSV, Norovirus? How to tell the difference
Symptoms of influenza are sore throat, cough, congestion, headaches and body aches. Fever is also a common symptom, although the Centers for Disease Control and Prevention said not everyone with the flu will have a fever.
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.
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,
Norovirus outbreak 2025: Symptoms, cases, and what to know as CDC data indicates a winter wave
The virus, often colloquially referred to as “stomach flu,” saw the percentage of positive tests double during the first week ...
Norovirus wave now more than double last year's peak, in CDC's data
Rates of norovirus in that CDC system have reached levels at or above last season's peak in all regions of the country.
Norovirus outbreak reported at shelter for California wildfire evacuees
First came the fires. Then, there was ash and contaminated water. Now, some survivors of the Southern California wildfires ...
Gothamist3d
So, there’s this thing going around NYC. Your guide to navigating the norovirus.
You can also get norovirus by touching objects or surfaces that are contaminated and then putting your hands in your mouth ...
CBS News on MSN11d
It feels like everyone has a stomach bug. A new norovirus strain might be to blame, CDC data suggests
"It is too early to tell if this strain is associated with more severe norovirus disease but likely lower population immunity ...
ConsumerAffairs13d
Cases of norovirus are up across the country, CDC finds
New data from the Centers for Disease Control and Prevention (CDC) has found that cases of norovirus, the very contagious ...
Hand sanitizer isn't enough to protect against norovirus. What should you do instead?
Hand sanitizer is simply not as effective against norovirus as it at killing other pathogens due to the virus's firm shell, ...
Fourth Holland America cruise norovirus outbreak since early December sickens 60
The cases mark the fourth norovirus outbreak on Holland America ships since early December, following others on its Eurodam, ...
Medscape5d
Highly Contagious Norovirus Cases Spike This Season
Drivers of the increase in norovirus cases may include a new strain, but continued precautions, good hygiene, can help reduce ...
WAVE32d
Kentucky ranked high in respiratory illness activity by CDC
“We are seeing somewhere in between 10 to 20 patients each day in the Children’s Hospital who need admissions,” Chief Medical ...