Fig. 3
From: Local and regional temporal trends (2013–2019) of canine Ehrlichia spp. seroprevalence in the USA
a The correlation between the trend parameter for canine Ehrlichia spp. for a given county and any other county is determined as a function of distance between those two counties. The curve represents the decaying influence as distance increases between the two counties. This is depicted in panel b using Howell County, MO as an example. Counties within the red circle have much greater influence over the regional trend estimate for Howell County than those within the grey area