Flu How to prevent and treat this common illness. What to know about bird flu Bird flu rarely spreads to humans. The Basics Flu infection facts Flu 101 How the flu spreads Cold or flu? Flu quiz More information Hand sanitizers: 8 do's and don'ts Is a flu shot right for you? Arthritis and the flu Treating the flu Preventing the flu when you have heart disease Too sick to work? Shield yourself from the flu How to set up a sickroom Related stories