U.S. flu season surges, with unusually high doctor visits and rising hospitalizations

A severe season with elevated flu-like illness activity

Influenza activity during the 2025–2026 U.S. flu season climbed to unusually high levels, with surveillance indicators pointing to widespread transmission across many states. Public-health tracking described a sharp increase in flu-like illness visits and a substantial burden of hospitalizations and deaths as the season progressed through late December and January.

Reports summarizing CDC surveillance data described flu-like outpatient visits reaching levels not seen in decades, reflecting broad community spread. In parallel, estimated totals for illnesses and hospitalizations rose quickly, underscoring the pressure influenza can place on emergency departments and inpatient capacity during the winter respiratory season.

While flu severity can vary by region, officials generally emphasize the same core tools: vaccination where available, early antiviral treatment for those at higher risk or with severe symptoms, and prevention steps such as staying home when sick and improving indoor air quality. Clinicians also advise parents and caregivers to pay close attention to warning signs in children and older adults, including difficulty breathing, dehydration, and persistent high fever.

What people can do during peak weeks

• Get a flu shot if you haven’t yet and it’s still available locally
• Ask a clinician promptly about antivirals if you’re high-risk or symptoms worsen
• Reduce spread by masking in crowded indoor spaces and improving ventilation

Health systems often see overlapping demand from influenza and other respiratory viruses during winter. As the season continues, public-health agencies encourage households to plan ahead—keeping basic fever reducers and hydration supplies on hand—and to seek medical help quickly for high-risk family members who deteriorate.