What the Flu Does to Your Body

The flu might be to blame, but it isn't what makes you feel so awful

Influenza gets a foothold in the respiratory tract but can make a person feel bad all over. Africa Studio/Shutterstock.com

Older folks over the age of 65 are especially susceptible to influenza infection since the immune system becomes weaker with age. In addition, older folks are also more susceptible to long-term disability following influenza infection, especially if they are hospitalized.

We all know the symptoms of influenza infection include fever, cough, sore throat, muscle aches, headaches, and fatigue. But just what causes all the havoc? What is going on in your body as you fight the flu?