WHAT THE EVIDENCE SAYS
Researchers analyzed eight archived shrews captured in Graubünden, Switzerland in 2005–06. Regana virus RNA was found in three bicoloured shrews from two sites, and near-complete or complete genome segments were assembled from liver tissues.
WHY IT MATTERS / OUR READ
Museum and archived wildlife samples can change the known distribution of a virus years after collection; detection is not a spillover event.
CAVEATS / UNCERTAINTY
Very small historical sample; no viral isolation, transmission route, disease in shrews, or human pathogenicity established.
SOURCE
Park et al. · Tropical Medicine and Health (3 Nov 2026)
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