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,
Norovirus, COVID, flu and RSV: The common symptoms and how to protect yourself
— The flu, caused by influenza viruses that are always changing, leads to fever, chills, cough, sore throat, runny nose, body aches, headaches and feeling tired. Flu symptoms tend to hit more quickly than cold symptoms, and can last anywhere from a few days to two weeks.
Sick Season Is in Full Swing. From Flu and RSV to Norovirus, Here’s What’s Going Around
Respiratory illnesses like influenza, COVID-19, and RSV are surging across the United States, according to CDC data. Norovirus has also been pegged to a large number of cases in recent weeks. Here's how to protect yourself.
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.
Flu, norovirus cases skyrocket in NYC — and the real number of sick is likely ‘much higher’ than reported
Norovirus infections jumped a stomach-turning 159% last month compared to the same span last year in NYC, where flu cases are ...
Stomach bug symptoms to know as norovirus cases are surging in the U.S.
Data from the Centers for Disease Control and Prevention show cases of norovirus, the highly contagious stomach bug, are ...
Feeling queasy? It might be norovirus, as 'stomach flu' surges in Brevard
Norovirus is surging across the US. Florida was ranked as the state with the second most outbreaks between Sept. 1, 2023 and ...
Rolling Out7d
7 facts reveal why norovirus cases surge in winter
Learn crucial prevention strategies as norovirus cases double nationwide, with experts sharing key insights on symptoms, ...
verywellhealth9d
Norovirus Cases Are Spiking Nationwide: How to Protect Yourself from the Stomach Bug
Norovirus infections can occur at any time of year, but they tend to peak during the colder winter months—that happens every ...
SC flu season: Norovirus, RSV, flu surge in South Carolina; hospitals restrict visitation
Bon Secours and Prisma Health are implementing new visitor restrictions as cases of influenza and respiratory illnesses rise ...
Newsweek on MSN12d
HMPV, Bird Flu and Norovirus: What Should US Be Most Worried About?
Health experts told Newsweek about the threats posed by the viruses and shared the best ways to protect oneself.
Medscape4d
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 ...