Why does this year’s flu feel different?
Across the country, people are reporting more intense symptoms and slower recovery from the current wave of influenza. The culprit? A new strain known as subclade K, a variant of Influenza A (H3N2), often referred to as this year’s “super flu.” With flu activity surging, especially along the East Coast, experts are seeing a notable rise in both severe illness and hospitalizations.
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What is subclade K?
Subclade K is a recent mutation within the Influenza A (H3N2) family. Influenza A is notorious for its rapid mutations, widespread transmission, and severe impact on adults, often leading to high fevers, intense body aches and respiratory complications like pneumonia. While Influenza B is typically milder and limited to humans, Influenza A can infect a broader range of hosts and often drives the most severe flu seasons.
Related Nuvance Health content: Can boogers tell me when I’m sick?
Why are “super flu” symptoms so intense?
Influenza A tends to bring on more severe symptoms and higher rates of hospitalization. With many people experiencing less exposure to typical seasonal viruses in recent years, immune defenses may be lower, making infections feel more sudden and harder to overcome. Symptoms often appear abruptly and can affect the entire body, with fatigue lingering long after other signs subside.
“Super flu” symptoms to watch for:
- High fever and chills (often above 100.4°F)
- Muscle and body aches
- Fatigue
- Cough and sore throat
- Headaches or head pressure
- Congestion or runny nose
If you notice your symptoms worsening or experience difficulty breathing, chest pain, or dehydration, visit your closest urgent care.
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How the “super flu” spreads
This aggressive flu virus travels mostly through tiny airborne droplets when someone coughs or sneezes. Touching contaminated surfaces and then touching your face is another common way to contract the virus. People are generally contagious a day before symptoms start and remain so for about a week.
Related Nuvance Health content: Norovirus: What it is and how to avoid it
What to do if you feel like you have the “super flu”
Acting quickly can make a big difference. Consider wearing a mask to reduce the risk to others. If symptoms intensify, contact your primary care provider or visit urgent care. Antiviral medications are most effective within the first 48 hours of symptom onset, so early communication is key.
Recovery is best supported with plenty of rest, staying hydrated and eating nourishing foods. Over-the-counter remedies may help ease fever, headaches, and body aches, while a humidifier can soothe your throat and make sleep more comfortably.
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Steps to lower your risk of catching the “super flu”
- The annual flu shot remains the most reliable way to reduce the severity and complications from both Influenza A and B, even when the strains vary.
Related Nuvance Health content: Staying up to date with adult vaccines
- Your primary care provider is a trusted resource for early advice and treatment, especially during peak flu periods.
- Wash your hands often with soap and warm water and use hand sanitizer when needed. You should regularly disinfect high-touch surfaces, avoid touching your face and cover your mouth with your elbow when coughing.
- Quality sleep, nutritious foods, regular movement and stress management can help your body respond to illness and recover more efficiently.
The bottom line: This year’s “super flu” is a reminder of the importance of prevention and quick action. By recognizing symptoms early and following preventive measures, you can help minimize complications and speed up your recovery. Stay informed and take proactive steps to protect yourself and those around you.
Dr. Rohini Nepal is a dedicated Primary Care Physician who completed her Internal Medicine training at NYC Health + Hospitals/Woodhull, Brooklyn, NY. She is excited to join Nuvance Health, part of Northwell Health, where she continues her commitment to providing high-quality healthcare services focused on patient well-being, prevention, and long-term health.
