Overview
Influenza, or flu, is a viral infection of the nose, throat and lungs that hits harder and faster than a common cold. It brings sudden high fever, body aches and exhaustion that can lay a healthy person low for several days. Most people recover with rest and fluids, but the very young, the elderly, pregnant women and those with heart or lung disease can develop serious complications like pneumonia.
Symptoms
- Sudden fever and chills
- Severe body and muscle aches
- Headache and extreme tiredness
- Dry cough and sore throat
- Runny or blocked nose
When to see a doctor
See a doctor if you are in a high-risk group, if fever lasts beyond three days, or if you develop breathlessness or chest pain.
Emergency — call 108 or go to the nearest hospital
- Difficulty breathing, chest pain, bluish lips, or confusion — signs of a serious complication, seek care immediately
Causes
Influenza viruses spread through coughs, sneezes and touching contaminated surfaces. Outbreaks are common in the changing seasons.