Home Our Services Disease Outbreak Alerts Flu Information

Flu Information

What is Influenza (Flu)?

Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent flu is by getting a flu vaccine each year.

Flu Symptoms

Flu can cause mild to severe illness, and at times can lead to death. Flu is different from a cold. Flu usually comes on suddenly. People who have flu often feel some or all of these symptoms:

fever*
cough
sore throat
runny or stuffy nose
body aches
headache
chills
fatigue
sometimes diarrhea and vomiting

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

People at High Risk from Flu

Anyone can get flu (even healthy people), and serious problems related to flu can happen at any age, but some people are at high risk of developing serious flu-related complications if they get sick. This includes people 65 years and older, people of any age with certain chronic medical conditions (such as asthma, diabetes, or heart disease), pregnant women, and children younger than 5 years.

Preventing Seasonal Flu

The first and most important step in preventing flu is to get a flu vaccine each year. Flu vaccine has been shown to reduce flu related illnesses and the risk of serious flu complications that can result in hospitalization or even death. CDC also recommends everyday preventive actions (like staying away from people who are sick, covering coughs and sneezes and frequent hand washing) to help slow the spread of germs that cause respiratory (nose, throat, and lungs) illnesses, like flu.

**COLD vs. FLU vs. CORONAVIRUS COVID-19**
Signs and Symptoms	Cold	Influenza (Flu)	Coronavirus COVID-19
Sore throat	Common	Common	Sometimes
Cough	Common	Common	Common
Sneezing	Common	Sometimes	--
Fever	--	Common	Common
Body aches/chills	Mild	Common	Sometimes
Tiredness	Mild	Common	Sometimes
Headache	--	Common	Sometimes
Runny/stuffy nose	Common	Sometimes	--
Nausea	--	Sometimes	--
Shortness of breath	--	--	In severe cases
Loss of taste or smell	--	--	Sometimes

More Information

Document Center

The Document Center provides easy access to public documents. Click on one of the categories below to see related documents or use the search function.