Explore the latest developments concerning Weekly US Influenza.
Weekly US Influenza Surveillance Report: Key Updates for Week 53, ending January 3, 2026 | FluView
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All data are preliminary and may change as more reports are received.
Directional arrows indicate changes between the current week and the previous week. Additional information on the arrows can be found at the bottom of this page.
A description of the CDC influenza surveillance system, including methodology and detailed descriptions of each data component is available on the surveillance methods page.1
Additional information on the current and previous influenza seasons for each surveillance component are available on FluView Interactive.
The Flu Really Is That Bad
The virus is storming the country, a reminder of how terrible its toll can be.
The flu situation in the United States right now is, in a word, bad. Infections have skyrocketed in recent weeks, filling hospitals nearly to capacity; viral levels are “high” or “very high” in most of the country. In late December, New York reported the most flu cases the state had ever recorded in a single week. My own 18-month-old brought home influenza six days before Christmas: He spiked a fever above 103 degrees for days, refusing foods and most fluids; I spent the holiday syringing electrolyte water into his mouth, while battling my own fever and chills. This year’s serving of flu already seems set to be more severe than average, Seema Lakdawala, a flu virologist at Emory University, told me. This season could be a reprise of last winter’s, the most severe on record since the start of the coronavirus pandemic—or, perhaps, worse.
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A ‘super flu’ strain is making everyone sick. Is this year’s vaccine effective?
A fast-spreading new flu strain is gaining a reputation as a monstrous “super flu.”
The mutation of influenza A(H3N2) called subclade K is driving up infections across the country, including in New Jersey, where the season’s first pediatric flu death was reported Friday.
The Centers for Disease Control and Prevention estimates that there have been at least 180,000 hospitalizations and 7,400 deaths from flu so far this season.
The majority of infections have been driven by influenza A(H3N2) viruses, specifically subclade K. This strain accounts for 91.5% of the influenza A(H3N2) viruses that have undergone additional testing at the CDC.
For more detailed information, explore updates concerning Weekly US Influenza.