Commonground
Senior Moderator
New variants of each virus have popped up recently, too.
Dec. 1, 2025
With new variants of both flu and norovirus spreading in the U.S., it worth knowing the symptoms of each viral illness — and the best ways to prevent getting sick in the first place.
And, considering the last flu season was the most severe the U.S. had seen in 15 years, some experts are concerned that this winter may be similarly challenging.
The new flu variant — called "subclade K" — is a type of H3N2, an influenza A strain. It caused severe flu outbreaks elsewhere in the world, including Japan, Canada and the U.K., before making its way here, Dr. Robert Hopkins Jr., medical director of the National Foundation for Infectious Diseases, told TODAY.com recently.
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Adding to that confusion is the fact that some people might refer to norovirus as the “stomach flu,” which isn’t an actual medical term, the experts say.
The main symptoms of norovirus include signs of gastroenteritis, Dr. Richard Martinello, infectious diseases expert and Chief Medical Officer for Yale Medicine, tells TODAY.com.
Norovirus Symptoms:
continued: https://www.today.com/health/cold-flu/norovirus-vs-flu-symptoms-rcna246783
Dec. 1, 2025
With new variants of both flu and norovirus spreading in the U.S., it worth knowing the symptoms of each viral illness — and the best ways to prevent getting sick in the first place.
And, considering the last flu season was the most severe the U.S. had seen in 15 years, some experts are concerned that this winter may be similarly challenging.
The new flu variant — called "subclade K" — is a type of H3N2, an influenza A strain. It caused severe flu outbreaks elsewhere in the world, including Japan, Canada and the U.K., before making its way here, Dr. Robert Hopkins Jr., medical director of the National Foundation for Infectious Diseases, told TODAY.com recently.
-snip-
Adding to that confusion is the fact that some people might refer to norovirus as the “stomach flu,” which isn’t an actual medical term, the experts say.
The main symptoms of norovirus include signs of gastroenteritis, Dr. Richard Martinello, infectious diseases expert and Chief Medical Officer for Yale Medicine, tells TODAY.com.
Norovirus Symptoms:
continued: https://www.today.com/health/cold-flu/norovirus-vs-flu-symptoms-rcna246783