Influenza

Overview

Influenza, often known as, "the flu," is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness, and at times can lead to death.

Symptoms & Diagnosis

People who have the flu often feel some or all of these signs and symptoms:

• Fever* or feeling feverish/chills
• Cough
• Sore throat
• Runny or stuffy nose
• Muscle or body aches
• Headaches
• Fatigue (very tired)
• Some people may have vomiting and diarrhea, though this is more common in children than adults

*It’s important to note that not everyone with the flu will have a fever.

Treatment

 There are influenza antiviral drugs that can be used to treat flu illness. Learn more at this CDC page about antiviral drugs.

Prevention

Take actions every day to help stop the spread of germs. Getting a flu vaccine is the most important for most people. Ask your provider if you should get a flu vaccine.

Taking other preventive actions may help reduce the spread of viruses like flu.

• Avoid close contact with people who are sick.
• Cover coughs and sneezes with a tissue. Throw the tissue in the trash after you use it.
• Wash your hands often with soap and water. If soap and water are not available, use an alcohol-based hand rub.

Important: If you get the flu, stay home for at least 24 hours after your fever is gone, except to get medical care or essentials. 

Reporting

Health care providers and laboratories are required to report influenza immediately.

For providers

Health care providers are essential in preventing and managing flu through vaccination, testing, treatment, and reporting.

Resources