Volume 24, Number 1—January 2018
Research
Changing Geographic Patterns and Risk Factors for Avian Influenza A(H7N9) Infections in Humans, China
Figure 2
![Distribution of predictor variables and influenza A(H7N9) infections in China, with 3 geographic extents: smallest extent around the location of human cases (top), Guangdong Province (bottom left), and Yangtze River Delta (bottom right). A) Visualization of poultry density (red), live-poultry market density (green), and chicken-to-duck ratio (blue). Dark areas correspond to low values and light areas to high values in all 3 predictors. B) Number of years with >1 human case per county. C) Dist](/eid/images/17-1393-F2.jpg)
Figure 2. Distribution of predictor variables and influenza A(H7N9) infections in China, with 3 geographic extents: smallest extent around the location of human cases (top), Guangdong Province (bottom left), and Yangtze River Delta (bottom right). A) Visualization of poultry density (red), live-poultry market density (green), and chicken-to-duck ratio (blue). Dark areas correspond to low values and light areas to high values in all 3 predictors. B) Number of years with >1 human case per county. C) Distribution of the fifth wave of human infections compared with previous waves.
1These authors contributed equally to this article.
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