Key Highlights
- The 2025-2026 flu season is one of the worst in recent years, with over 11 million illnesses and more than 5,000 deaths.
- A new variant, dubbed “super flu,” has emerged, causing severe flu seasons in Japan and the UK.
- Hospitals across the country are overwhelmed, with emergency departments packed due to a surge in flu cases.
- Flu symptoms include fever, chills, fatigue, body aches, cough, and GI complaints like vomiting and diarrhea.
- Even though it’s not too late, getting a flu shot is still recommended as the vaccine offers cross-protection against circulating strains.
The Severe 2025-2026 Flu Season: An Unprecedented Surge in Infections and Hospitalizations
As the winter months bring harsher conditions, so too does an already severe flu season that is overwhelming hospitals and emergency rooms across the United States. According to new data from the U.S. Centers for Disease Control and Prevention (CDC), at least 45 states are reporting “high” or “very high” influenza activity, setting a concerning precedent for public health.
Unprecedented Levels of Flu Activity
The flu season is in full swing, with outpatient visits for flu-like symptoms reaching the highest level since the 1997-1998 season. Dr. Michael Phillips, director of the Division of Infectious Diseases at NYU Grossman School of Medicine, emphasizes the severity: “There’s no doubt about it.
It’s an unusual season. It’s been severe, with a rapid onset.”
New Variant: The ‘Super Flu’
Fueling the majority of cases is a new variant known as the “super flu.” Specifically, a mutated influenza A H3N2 strain called subclade K has emerged earlier this year. This variant caused early and severe flu seasons in Japan and the United Kingdom. Dr.
Scott Roberts, assistant professor of infectious diseases at the Yale School of Medicine, explains: “It’s one of our worst flu seasons since before COVID. … It’s rough out there.”
Hospitals Strained by Flu Cases
The impact on hospitals has been significant. In New York City, where the season is particularly severe, flu-related hospitalizations have reached a record high. Dr.
Michael Phillips notes: “New York was hit hard and hit early. Our emergency departments are packed.” Connecticut is also experiencing a sharp rise in flu hospitalizations. Dr.
Jason Newland of Nationwide Children’s Hospital adds: “On a normal day, we operate at 95% capacity. … When you add 100 flu patients on top of that, it’s going to strain the system.”
Flu Symptoms and Impact
The symptoms are remarkably similar to previous years, including fever, chills, extreme fatigue, body aches, sore throat, cough, stuffy or runny nose, and gastrointestinal complaints like vomiting and diarrhea. Dr. Linda Yancey from Memorial Hermann Houston says: “The flu will make you feel like you’ve been hit by a truck.” Flu symptoms often start suddenly and intensely.
Importance of Vaccination
Even though the 2025-2026 flu season is well underway, it’s not too late to get vaccinated. The CDC recommends that everyone aged six months or older should receive a flu shot. Dr.
Michael Phillips emphasizes: “The vaccine is still going to offer cross-protection. It just won’t be as robust as what we wanted.” The 2025-2026 flu vaccine includes three viruses: influenza A H3N2, influenza A H1N1, and influenza B. While there’s a slight mismatch with the H3N2 strain due to subclade K emerging after scientists finalized which strains the vaccine would target, getting vaccinated is still highly recommended.
For more information on flu symptoms, testing methods, and vaccination recommendations, visit the CDC website or consult your healthcare provider. Remember, while the flu can be severe for vulnerable groups like children under 2 years old and individuals over 65, getting vaccinated significantly reduces the risk of severe illness, hospitalizations, and deaths.