Serologic evidence of the presence of the hantaviruses Puumala virus and Dobrava virus in small mammals in the Volyn Province, Ukraine, as determined by immunofluorescence assay (IFA). (A) Sampling locations in 2012–13 in Volyn Province where small mammals were captured for testing. (B) The location of Volyn Province within Ukraine (yellow). (C) Numbers of bank vole (Myodes glareolus) captures, increasing from 0 (white) to 207 (darkest blue). (D) Numbers of bank vole with IFA-positive results, from 0 (white) to 12 (darkest blue). (E) Numbers of striped field mouse (Apodemus agrarius) captures, from 0 (white) to 57 (darkest blue). (F) Numbers of striped field mouse with IFA-positive results, from 0 (white) to 5 (darkest blue).