Using Big data

Predict Flu trends (Google flu trends)
- Took 50 mil most common search queries between 2004-2008
  - what like all queries? or things related to the flu
- Then GTF started to consistently overestimate the flu trends
  - why?
  - some people searching up symptoms are not the actual amount o people getting the flu
- combing with two week old CDC data still provided a good model