Table 1.

Bi-directional cross-correlation coefficients displaying the linear association between Google Trends records of Chikungunya and Zika and registered febrile cases in 2014–2016

Disease	Lag in weeks
	−3	−2	−1	0	+ 1	+ 2	+ 3
Chikungunya	0.564	0.677	0.745	0.784	0.734	0.666	0.585
Zika	0.618	0.660	0.671	0.705	0.754	0.753	0.710