Health Info
Influenza Information
What is the flu?
The flu is a highly contagious respiratory infection caused by influenza viruses. The virus usually enters the body through mucus membranes in the mouth, nose, or eyes. When a person with the flu coughs or sneezes, the virus then becomes airborne and can be inhaled by anyone nearby. You can also get the flu if you’ve touched a contaminated surface like a telephone or a doorknob and then touch your nose or mouth.
Is it a cold or the flu?
Signs & Symptoms | Influenza | Cold |
---|---|---|
Symptom onset | Abrupt | Gradual |
Fever | Usual; lasts 3-4 days | Rare |
Aches | Usual; often severe | Slight |
Chills | Fairly common | Uncommon |
Fatigue, weakness | Usual | Sometimes |
Sneezing | Sometimes | Common |
Stuffy nose | Sometimes | Common |
Sore throat | Sometimes | Common |
Chest discomfort, cough | Common; can be severe | Mild to moderate; hacking cough |
Headache | Common | Rare |