New variant of the flu virus is driving surge of cases across the US and Canada
- Written by Zachary W. Binder, Associate Professor of Pediatrics, UMass Chan Medical School
The 2025-2026 flu season seems to be affecting children more severely than usual.Renphoto/iStock via Getty ImagesAfter 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 peak in the U.S., according to data...
Read more: New variant of the flu virus is driving surge of cases across the US and Canada

