Figure 2.

Correlation between both hemorrhagic fever with renal syndrome (HFRS) incidences in humans (A) and hantavirus infections in rodents (B) and selenium content. The rodent data were from 40 surveillance sites in Mainland China during the years 2005–2008. The points reflect (A) average incidences of HFRS in human for the counties each surveillance site and (B) annual average hantavirus infections in rodents for each surveillance site, and the lines represent the median bands. Selenium content of crops and feed ≤0.02 ppm represents severe selenium-deficient areas; 0.03–0.05 ppm represents moderate selenium-deficient areas; ≥0.06 ppm represents non-deficient areas.