Cases of the flu are rising across the country with some states getting hit harder than others.
The nationwide hospitalization rate jumped by 14.3% with over 9,900 people admitted with the flu, according to data released on Friday by the Centers for Disease Control and Prevention (CDC).
Two influenza-associated pediatric deaths during the 2025-2026 season were reported this week, bringing the seasonal total to three reported flu-related pediatric deaths.
Influenza A (H3N2) viruses were the most frequently reported influenza virus so far this season.
The flu is spreading especially high in New York, New Jersey, Rhode Island, Louisiana and Colorado, according to health officials.
Georgia, New Mexico, Idaho, Michigan, North Carolina, South Carolina, Massachusetts, Connecticut, Maryland and Washington, D.C. have elevated hospital visits for flu symptoms.
Dr. Andrew Pekosz, an infectious disease specialist with the Johns Hopkins Bloomberg School of Public Health, said that the “super flu” strain, or subclade K, is spreading everywhere influenza is, according to The Hill.
The new variant emerged over the summer and spread rapidly in several countries such as Japan, the United Kingdom and Canada.
The new subclade K strain is a mutation of the H3N2 strain of influenza A, according to the World Health Organization.
Symptoms for influenza A and its subclade K variant are similar, and both are typically more serious than influenza B.
They include fever, cough, sore throat, congestion, body aches, headaches, fatigue and occasionally vomiting or diarrhea, according to the CDC.