What we know as "the flu" is a viral and highly contagious respiratory illness. It can affect the nose, throat, and even the lungs.
These symptoms can be mild to severe. At its mildest, symptoms can be managed with over-the-counter medication. At its worse, the flu can result in a hospital stay.
Your best line of defense? Not getting it in the first place. Here's how to fortify your immune system and get ready for flu season, naturally: