Here are the inferred flu rates for England & Wales in the last 6 months
based on geolocated Twitter content
Check Regional Flu Inferences:
for the last 6 months
since June 2009
Flu Detector uses the content of Twitter to nowcast flu rates in several UK regions. Inferences are compared with official ILI rates from HPA. Some early performance evaluation results are available here. The methodology is described in the following publications:

Current Flu Rate
17.42

Vertical axis Inferred flu rate indicating the number of GP consultations per 100,000 citizens where the diagnosis' result was Influenza-like Illness (ILI)
Horizontal axis Date in yyyy-mm-dd format