HFRSLast updated 2025-10-15

Hantavirus in Sweden

Northern Sweden experiences large multi-year cycles of HFRS driven by bank-vole population dynamics. The Public Health Agency of Sweden (Folkhälsomyndigheten) monitors risk yearly.

Cumulative Cases

1,500

Deaths

5

CFR

0.3%

Global Rank

#7

by case count

Circulating Strains

  • ●Puumala virus (PUUV)

Primary syndrome: Hemorrhagic Fever with Renal Syndrome (HFRS).

Reservoir Species

  • • Bank vole (Myodes glareolus)

Most Affected Regions

  • • Västernorrland
  • • Västerbotten
  • • Jämtland

Country-specific Risk & Prevention

Summer cottages opened after winter dormancy are common exposure sites; ventilate before entry.

General prevention: see symptoms and prevention guidance →

Field Notes

Puumala virus. Northern Sweden primarily affected.

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