Figure 2.

Map of age-adjusted WNV rates with locations of dead bird specimens The age-adjusted rates were calculated by census tract. The point locations of the dead birds are approximate locations of the specimens found during 2001 and 2002 and tested positive for WNV.

Ruiz et al. International Journal of Health Geographics 2004 3:8   doi:10.1186/1476-072X-3-8
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