Flu season 2025: Subclade K variant known as 'Super K' showing fast flu symptoms amid holiday gatherings
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This flu season is intensifying at an alarming rate, health officials warn, as the virus continues to spread relentlessly. The uptick in cases comes in the wake of holiday gatherings, which provided a fertile ground for infections to proliferate.

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Recent figures from the Centers for Disease Control and Prevention (CDC) reveal a staggering increase, with nearly five million flu cases reported nationwide. Although the flu is making its presence felt across the United States, not all states are equally affected.

Illinois, for instance, reports lower infection rates compared to many other regions. Meanwhile, New York is grappling with what is classified as ‘high’ respiratory illness activity. States such as Alabama, Colorado, Connecticut, Hawaii, Louisiana, Maryland, Minnesota, New Hampshire, New Jersey, Ohio, Rhode Island, and Texas are experiencing ‘moderate’ levels of flu activity. The remaining states are fortunate to have low or very low levels of flu cases at this time.

In related news, a poignant story from Michigan highlights the severity of the flu’s impact. A young boy, who underwent amputation of his legs following a severe flu case, is now sharing his experience and urging everyone to get vaccinated. His story serves as a stark reminder of the potential consequences of this illness and the importance of preventive measures.

New York is seeing ‘high’ respiratory illness activity. Alabama, Colorado, Connecticut, Hawaii, Louisiana, Maryland, Minnesota, New Hampshire, New Jersey, Ohio, Rhode Island, and Texas are seeing ‘moderate’ activity. All other states are seeing low or very low levels.

READ ALSO | Michigan boy whose legs were amputated after severe flu case shares story, urges all to get vaccine

While this year’s flu seems similar to previous years, including symptoms like high fever, body aches and fatigue, doctors said this year’s strain is showing more vomiting in children and symptoms are coming on faster and more intensely.

The bulk of this year’s cases are being linked to a new variant known as subclade K.

Doctors say the flu shot will still help reduce your risk of severe illness. However, fewer Americans have been vaccinated this year.

“It’s a good idea to go and swab and get tested, because you might be able to take an antiviral such as Tamifu for influenza, as long as you start that quickly, usually within 48 hours of symptoms,” ABC News medical contributor Dr. Alok Patel said.

The CDC recommends everyone over the age of 6 months get their flu shot.

ABC News contributed to this story.

READ ALSO | Chicago-area health officials expect bad flu season, push for vaccinations despite federal guidance

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