Hantavirus strains
Hantaviruses are a family of rodent-borne viruses, with each strain tied to a specific rodent host and geographic region. New World strains tend to cause hantavirus pulmonary syndrome (HPS); Old World strains tend to cause hemorrhagic fever with renal syndrome (HFRS). Five strains account for the majority of human cases worldwide.
Reservoir: Deer mouse
Region: North America (especially the western and southwestern United States)
Reservoir: Long-tailed pygmy rice rat
Region: Southern South America (Argentina, Chile, parts of Uruguay and Bolivia)
Reservoir: Bank vole
Region: Northern, central, and western Europe (especially Finland, Sweden, Germany, Belgium)
Reservoir: Striped field mouse
Region: East Asia (China, Korean peninsula, far-eastern Russia)
Reservoir: Brown rat
Region: Worldwide (anywhere brown rats are present), with documented human cases on every inhabited continent