Fig. 2
From: The patterns and driving forces of dengue invasions in China
The interlinkage between oversea-imported and local dengue cases. a The monthly time-series on imported and local dengue cases in China. The Spearman correlation was 0.57, P-value < 0.01. b Impulse response from imported cases to imported and local dengue cases. The shocks imposed from imported cases to the dengue source-sink system were shown. c Impulse response from local cases. The shocks imposed from local cases to the dengue source-sink system were shown. The shadow areas show the 95% confidence intervals