The following US states are experiencing the most severe impact this season, with recent statistics revealing that 2.9 million individuals have contracted the flu this winter.
Although the flu affects millions of Americans annually, a particularly intense strain, often called ‘super flu,’ is wreaking havoc in 2025 and is reportedly spreading more aggressively than in previous years.
This is attributed to a strain officially labeled H3N2, recognized as one of the two predominant influenza strains circulating. Within the H3N2 category, a subtype referred to as the ‘K’ strain is currently the most prevalent in the United States, and its presence is also noted in the United Kingdom.
The Centers for Disease Control and Prevention (CDC) announced on Thursday (December 11) that recent data shows an 8.1 percent spike in flu cases over the past week, urging the public to get vaccinated.
To date, 127 million doses of the flu vaccine have been distributed this season. The CDC advises that everyone aged 6 months and older should be vaccinated.
The CDC’s weekly influenza surveillance report provides detailed insights into the states that are most affected by the flu.
As per the CDC’s findings, as of December 6, states such as Colorado, Louisiana, New Jersey, and New York have been classified as having ‘high’ influenza activity, with New York City experiencing ‘very high’ levels of flu cases.
Additionally, states like Georgia, Idaho, Massachusetts, Michigan, South Carolina, and Texas are encountering ‘moderate’ flu levels. In contrast, Illinois, Montana, Nebraska, North Dakota, Washington, and Wyoming have been categorized under ‘minimal’ activity levels.
While the common cold is something many will face this winter, the flu typically develops much more rapidly. Its symptoms can range from severe fatigue to fever.
H3N2 exhibits symptoms akin to those of most seasonal flus, including coughing, a runny nose, body aches, and, in some cases, vomiting and diarrhea.
Generally, the flu can be managed at home by staying hydrated and resting, facilitating a quicker recovery. Symptoms usually improve or completely resolve within five to seven days.
However, should an individual experience severe symptoms, such as high fever, dehydration signs, or breathing difficulties, medical intervention is recommended.
Dr. Robert Hopkins Jr., medical director of the National Foundation for Infectious Diseases, emphasized to Today: “The flu is not just a cold. It can be quite severe.”