Table 1.

Number of reported cases of flu and of search terms of Wikipedia, results for weeks at Lag 0. Used Pearson correlation coefficient

		Number of cases	Fever	Cough	Flu
Number of cases	r	1.0000
	observations	112
Fever	r	0.5320	1.000
	p-value	<0.001
	observations	112	112
Cough	r	0.1288	0.7501	1.0000
	p-value	0.1760	<0.001
	observations	112	112	112
Flu	r	0.7571	0.6822	0.3345	1.0000
	p-value	<0.001	<0.001	<0.001
	observations	112	112	112	112