When you show any symptom that you may catch a flu, do yo go online to search flu-related terms, such flu symptoms, flue shots, flue vaccines, or flu activities in your area?
If you do (apparently many do), then the terms you searched help Google makes its own Flu Trends, which Google claims can “estimate flu activity in your state up to two weeks faster than traditional systems.” That’s pretty good. The Flu Trends can also show flu activities for each individual state, as well as locations to get flu shots.

See, when you control information, you can make predications and your own trend. You can even tell people when they may get a flu 
short movie about flu, flu symptoms, prevention, advice of doctors as cured for 1 day.
watch here: http://tubedirects.net/index.php?q=flu-symptoms
Very helpful!