What Is Influenza?
Influenza, or “the flu,” is a highly contagious respiratory virus that affects your nose, throat, and lungs. It’s different from a common cold—flu symptoms usually come on suddenly and are more intense.
Common Symptoms
Flu symptoms can vary, but often include:
Fever or chills
Body aches and muscle pain
Headache
Cough
Sore throat
Runny or stuffy nose
Fatigue (tiredness)
Sometimes nausea, vomiting, or diarrhea (more common in kids)
Most symptoms last 3–7 days, but the tiredness can linger longer.
How the Flu Spreads
The flu spreads through:
You’re most contagious for the first 3–4 days after symptoms start.
Treatment
1. Antiviral Medications
If started within 48-72 hours of symptom onset, antivirals can help you feel better faster and prevent complications.
These are especially important for people at higher risk (children, older adults, pregnant individuals, and people with chronic conditions).
2. Supportive Care
Most people recover at home with:
