Additional file 1.

Map from the flusurvey showing the geographical spread of participants. This shows the approximate location of flusurvey users: red points indicate people with influenza-like symptoms, blue indicates people with other respiratory symptoms and green indicates people who do not have respiratory symptoms.

Format: BMP Size: 727KB Download file

Tilston et al. BMC Public Health 2010 10:650   doi:10.1186/1471-2458-10-650