Subject area	Epidemiology
More specific subject area	Digital epidemiology
Type of data	Table and graphs
How data were acquired	Outsourcing of Google Trends website and of the Italian National Health Institute (ISS) site concerning West-Nile virus disease
Data format	Raw, analyzed
Experimental factors	Google Trends search volumes were obtained through heat-maps
Experimental features	Validation of Google Trends-based data with “real-world” data taken from the Italian National Health Institute (ISS) was performed by means of correlational analysis. Further, autocorrelation and partial autocorrelation analyses and regressions were carried out.
Data source location	Italy
Data accessibility	Data are within this article