13 doctors weighed in:

What are the differences between hay fever and flu?

13 doctors weighed in
Dr. Alex Martinez
Internal Medicine - Allergy
10 doctors agree

In brief: Fever, length

Hay fever (an allergic response to pollen) and flu (a viral infection) may have similar symptoms (sneezing, runny nose, congestion, headache, scratchy throat) but differ in important ways.
Allergies can last weeks but flu lasts 1-2 weeks. Allergies don't cause fever whereas flu can cause high temperature & chills. Of course, flu is contagious but allergies are not. Consult your doctor to be sure.

In brief: Fever, length

Hay fever (an allergic response to pollen) and flu (a viral infection) may have similar symptoms (sneezing, runny nose, congestion, headache, scratchy throat) but differ in important ways.
Allergies can last weeks but flu lasts 1-2 weeks. Allergies don't cause fever whereas flu can cause high temperature & chills. Of course, flu is contagious but allergies are not. Consult your doctor to be sure.
Dr. Alex Martinez
Dr. Alex Martinez
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Dr. Brian Novick
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: Allergy vs infection

Hay fever is an allergy to substances in the air. Flu is due to a viral infection.

In brief: Allergy vs infection

Hay fever is an allergy to substances in the air. Flu is due to a viral infection.
Dr. Brian Novick
Dr. Brian Novick
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