Finland reports seasonal rise in Puumala hantavirus infections
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Country profile
Hantavirus in Finland
Severe risk·91/100
Hantavirus signals for Finland are aggregated from WHO Disease Outbreak News, ProMED-mail, PAHO bulletins, and global news (GDELT & Google News). The risk index combines news mention density, verified outbreak reports, source authority, and recency. Hantaviruses are considered endemic in this country.
News (30d)
1
Confirmed cases (90d)
12
Source authority
0.60
Recency
0.91
Mention activity · 24 months1 mentions
−24m−12mnow
Recent news from Finland
FAQ
Hantavirus in Finland: questions answered
Is hantavirus present in Finland?
Yes — Finland is a known reporting region for hantavirus. The principal strain associated with human cases is Puumala virus, primarily carried by bank vole. Local transmission produces hemorrhagic fever with renal syndrome (HFRS). As of May 2026, the Hantavirus Tracker risk index for Finland is 91/100, classified as severe. The score combines news mention density, verified outbreak reports, source authority, and recency.
What is the current hantavirus risk in Finland?
The current composite risk index for Finland is 91/100 (severe). This is computed from the volume of recent hantavirus mentions in news (last 30 days), verified outbreaks reported by WHO, CDC, PAHO, and ProMED-mail, the authority weight of those sources, and how recently the latest event occurred. The score is a signal of attention and reported activity, not a clinical case-rate forecast.
How does hantavirus spread in Finland?
Most human infections in Finland occur when people inhale aerosolized particles from rodent urine, droppings, or saliva, typically while cleaning enclosed spaces such as cabins, sheds, barns, or rural homes that have had rodent activity. Less commonly, infection follows a rodent bite or eating food contaminated by rodents. Person-to-person spread is generally not documented for hantaviruses globally, with the notable exception of Andes virus in southern South America, which has produced confirmed person-to-person clusters in Argentina and Chile.
What are the symptoms of hantavirus and when should someone in Finland seek care?
Early symptoms appear roughly one to eight weeks after exposure and include fever, severe muscle aches (especially in the thighs, hips, lower back), headache, nausea, vomiting, and abdominal pain. After several days, HFRS patients develop low blood pressure, hemorrhage, and acute kidney injury that may require dialysis. Anyone with flu-like symptoms and recent rodent exposure (within the last six weeks) should contact a healthcare provider immediately and explicitly mention the rodent contact history.
How is hantavirus prevented in Finland?
Prevention focuses on reducing contact with rodents and their droppings: seal openings ¼ inch and larger in homes and outbuildings, store food in rodent-proof containers, remove brush and woodpiles near dwellings, and clean rodent-contaminated areas safely. Never sweep or vacuum dry droppings — that aerosolizes the virus. Instead, ventilate the space, wear gloves and an N95 respirator, spray surfaces with a 1:10 bleach-water solution, let it soak five minutes, then wipe with paper towels and double-bag the waste. People working in rural agriculture, hantavirus-endemic forests, or cleaning long-unused cabins in Finland are at the highest occupational risk.
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Prevention
- Seal openings ¼ inch and larger in homes and outbuildings.
- Trap rodents and remove sources of food and shelter.
- When cleaning rodent-contaminated areas, wet down with a 1:10 bleach-water solution before wiping; never sweep or vacuum dry droppings.
- Wear gloves and an N95 respirator when cleaning enclosed rodent-affected spaces.
See the full prevention guide →
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Reference
Read more: What is hantavirus · Symptoms · Transmission · Historical outbreaks