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Why does flu A feel so severe in young adults?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am 22 years old and was recently diagnosed with influenza A. The symptoms felt much worse than I expected for my age, including high fever, body aches, and extreme fatigue that lasted longer than I thought.

This made me wonder why influenza A at 22 can feel so severe in young adults this season, as I usually assumed younger people recover quickly. Could it be due to new strains or lower immunity?

I am still feeling weak after a few days, so I want to understand if this is normal or something unusual.

Please help.

Thank you.

Answered by Dr. Ashraf Ghani

Education:

MD

Professional Bio:

Dr. Ashraf Ghani is a dedicated general medicine physician committed to providing comprehensive and evidence-based healthcare for adult patients. He has experience in diagnosing and managing a wide range of acute and chronic medical conditions, including diabetes, hypertension, infections, respiratory illnesses, and lifestyle-related disorders. Dr. Ashraf Ghani focuses on accurate diagnosis, preventive care, and personalized treatment plans tailored to each patient's needs. Known for his compassionate and patient-centered approach, Dr. Ashraf Ghani strives to help patients achieve better health through clear communication and quality medical care.  

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com

I have read your query and acknowledge your concern.

Influenza A (an acute respiratory viral infection) can sometimes cause significant symptoms even in young adults. The severity depends on a number of factors, including the specific viral strain circulating, your immune system’s response, and prior exposure to similar viruses.

Some strains may cause more severe systemic symptoms such as muscle aches and fever, especially during specific seasons, even in healthy people. After times of reduced exposure to common respiratory infections, overall immunity among the population is low; therefore, infections will seem more serious.

It is also normal for fatigue and weakness to persist for several days after the fever resolves, as the body continues to recover from the infection.

As long as symptoms are gradually improving and there are no warning signs such as difficulty breathing, chest pain, persistent high fever, or worsening weakness, this course is usually within the expected recovery pattern.

I hope you are satisfied with my answer.

For further queries, you can consult me at iCliniq.

Thank you.

Medically reviewed by iCliniq medical review team
Published At May 21, 2026
Reviewed At July 14, 2026

Education:

MD

Professional Bio:

Dr. Ashraf Ghani is a dedicated general medicine physician committed to providing comprehensive and evidence-based healthcare for adult patients. He has experience in diagnosing and managing a wide range of acute and chronic medical conditions, including diabetes, hypertension, infections, respiratory illnesses, and lifestyle-related disorders. Dr. Ashraf Ghani focuses on accurate diagnosis, preventive care, and personalized treatment plans tailored to each patient's needs. Known for his compassionate and patient-centered approach, Dr. Ashraf Ghani strives to help patients achieve better health through clear communication and quality medical care.  

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Education:

MD

Professional Bio:

Dr. Ashraf Ghani is a dedicated general medicine physician committed to providing comprehensive and evidence-based healthcare for adult patients. He has experience in diagnosing and managing a wide range of acute and chronic medical conditions, including diabetes, hypertension, infections, respiratory illnesses, and lifestyle-related disorders. Dr. Ashraf Ghani focuses on accurate diagnosis, preventive care, and personalized treatment plans tailored to each patient's needs. Known for his compassionate and patient-centered approach, Dr. Ashraf Ghani strives to help patients achieve better health through clear communication and quality medical care.  

This doctor is not available for online consultations on the platform anymore.

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