Watch these videos from the CDC to learn more about how flu makes you sick and the common symptoms of flu.
How Does Flu Make You Sick?
Flu virus infection triggers inflammation in your body. Severe inflammation can cause lung damage and other serious problems. Everyone 6 months and older needs flu vaccine each year.
Know the Common Symptoms of Flu
Influenza (also known as flu) is a contagious respiratory illness caused by flu viruses. It 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 are sick with flu often feel some or all of these symptoms; fever* or feeling feverish/chills (though, it's important to note that not everyone with flu will have a fever), cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and fatigue (or tiredness).