Table 6. Similarity metrics between 3 data sources: the number of influenza cases at a lag of one month, Baidu keywords, ensemble data, for the time period October 2014–December 2015.

	RMSE	RMSPE (%)	MAPE (%)
Influenza cases at a lag of one month	82.874	40.658	35.150
Baidu keywords	43.472	30.438	26.806
Ensemble model	42.654	29.687	26.197