The spatial distribution of HFRS incidence in Hubei Province, China.

<p>The color gradient presents the annual incidence of HFRS in thematic maps. All counties were grouped into four categories: non-endemic area, low endemic area with annualized average incidence between 0 and 5 per 100,000, moderate endemic area with annualized average incidence between 5 and 30 per 100,000, and high endemic area with annualized average incidence over 30 per 100,000.