A new flu variant is sweeping across the United States, causing millions of reported cases and doubling the number of hospitalizations in a surge doctors say may not end for weeks. Flu activity is at ...

This story was updated to add new information. A new flu variant is sweeping across the United States, causing millions of reported cases and doubling the number of hospitalizations in a surge doctors ...

Scientists investigating how influenza viruses replicate within cells "accidentally" discovered that different flu viruses ...

After a sharp uptick in flu cases in mid-December 2025, flu activity across the U.S. and Canada remains high. Although cases are trending downward in Canada as of Jan. 9, 2026, the season has yet to ...

While flu vaccines can help prevent infection, and antiviral drugs can shorten the illness and prevent complications in ...

Helen Branswell covers issues broadly related to infectious diseases, including outbreaks, preparedness, research, and vaccine development. Follow her on Mastodon and Bluesky. You can reach Helen on ...

The 2025-2026 flu season is surging in the U.S. and New Jersey, where there's been increased severity of influenza A, with further testing from the CDC showing many NJ residents have the emerging ...

After several weeks of declining cases of influenza, it appears the North Bay is being hit by a second wave of flu infections, according to local health experts. Sutter Health’s clinics and regional ...

Respiratory virus season is in full swing across California, with several illnesses spreading across the state. Cases of influenza and respiratory syncytial virus are on the rise, the California ...