Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12879-015-1164-9/MediaObjects/12879_2015_1164_Fig2_HTML.gif)
Spatial odds ratio for the prevalence of total anti-HAV antibodies in Assis Brasil for the year of 2011. Crude odds ratio surface estimated by a GAM model. Positive cases are represented in black dots and negative in white dots. Odds ratio values are represented in a gray scale, from 0 to 8.33. Black lines limitate the area where odds ratio is higher than 2. A hotspot of anti-HAV-positive children is present in the new easternmost area