Gert E. Olsson*†
, Fredrik Dalerum*1
, Birger Hörnfeldt†, Fredrik Elgh†, Thomas R. Palo*2
, Per Juto†, and Clas Ahlm†
Figure 5. Spatial distribution of nephropathia epidemica infections during 1991 to 1998 in the northern half of Sweden as suggested by patients confident about their site of virus exposure (n = 862). Sites of virus exposure are represented by red (1998 outbreak) and gray dots (remaining years). Densely built-up areas are represented by yellow squares (8,400 to 71,000 inhabitants). Kernel estimates (bold contours) on spatial clustering of cases represent 95%, 75%, and 50% chances of encountering a case among the 862 samples.