Hantavirus: What It Is, How It Spreads, and What to Watch

Disease profile

Common names

Hanta virus, Hantavirus disease

Transmission routes

• Inhalation of aerosolized particles from rodent urine, droppings, or saliva
• Bite or scratch from an infected rodent (rare)
• Person-to-person (Andes virus only, in close prolonged contact)

Official sources

• WHO (as of 2026-05-10)
• CDC (as of 2026-05-10)
• ECDC (as of 2026-05-10)
• PAHO (as of 2026-05-10)

What hantavirus is, in plain language

Hantaviruses are a family of viruses carried by certain rodents. People can catch them mostly by breathing in tiny particles from rodent urine, droppings, or saliva — for example, in places like cabins, sheds, or barns where mice or rats have been. Most people are never exposed. Different hantaviruses cause different illnesses depending on the region. Person-to-person spread is rare and is documented only for one type, the Andes virus, found in South America.

Sources: WHO factsheet, CDC About Hantavirus, ECDC factsheet on orthohantavirus infections, PAHO topic page (Tier 1).

Symptoms officials describe

Official sources describe early symptoms that can include fever, fatigue, and muscle aches in large muscle groups, with about half of patients also reporting headaches, dizziness, chills, and abdominal symptoms such as nausea, vomiting, or diarrhea (CDC; consistent with WHO and ECDC). In the Americas, later symptoms can include coughing, shortness of breath, and chest tightness as the lungs fill with fluid (HPS — CDC). In Eurasia, the typical presentation involves flu-like symptoms with kidney involvement (HFRS — ECDC).

Specific numeric figures (e.g. typical onset window, regional case ranges, case-fatality figures) live in the cited official sources rather than on this page. Open the linked WHO / CDC / ECDC / PAHO factsheets at the bottom of the page for the agency wording.

Prevention

Public-health agencies recommend reducing rodent presence in homes and workplaces, cleaning rodent-contaminated areas safely (wet cleaning rather than sweeping or vacuuming, with masks and gloves; ventilating closed rooms before entry), strengthening everyday hand hygiene, and following local public-health guidance in areas where outbreaks occur.

Sources: WHO; CDC; ECDC; PAHO (Tier 1).

Where it appears

Hantaviruses occur in many parts of the world, but the specific viruses, the rodent species that carry them, and the diseases they cause vary by region. The Americas see hantavirus cardiopulmonary syndrome (Sin Nombre, Andes); Europe sees haemorrhagic fever with renal syndrome and a milder nephropathia epidemica (Puumala, Dobrava); parts of East Asia see HFRS (Hantaan, Seoul). Risk varies by location and exposure to rodent-contaminated environments. Travelers should consult their destination's public-health agency.

Common questions

Frequently asked

What is hantavirus?

Hantaviruses are a group of viruses carried by rodents that can cause severe disease in humans. Different hantaviruses cause different syndromes — primarily hantavirus cardiopulmonary syndrome in the Americas and haemorrhagic fever with renal syndrome in Europe and Asia (WHO; PAHO; ECDC).

Is hantavirus contagious between people?

For most hantaviruses, no. ECDC notes that with the exception of the Andes virus, orthohantaviruses are not transmitted from person to person, so isolation of patients is not required. Andes virus, found in South America, is the one known exception, with limited person-to-person transmission documented in close, prolonged contact (CDC; PAHO).

How do people get exposed?

Most exposures happen by breathing in particles from infected rodents' urine, droppings, or saliva — for example, in closed spaces where mice or rats have been (WHO; CDC; ECDC). Bites or scratches are a possible but rare route.

What symptoms do official sources describe?

WHO describes symptoms that typically include fever, headache, muscle aches and gastrointestinal symptoms such as abdominal pain, nausea or vomiting, appearing roughly one to eight weeks after exposure. In the Americas the disease can progress to involve the lungs (HPS); in Eurasia it more often involves the kidneys. Outbreak Signal does not publish a diagnostic checklist; consult a qualified healthcare provider with personal questions.

How can exposure risk be reduced?

Public-health agencies recommend reducing rodent presence (sealing entry points, secure food storage, removing nesting sites), cleaning rodent-contaminated areas safely (wet cleaning, masks/gloves, ventilating spaces), and strengthening hand hygiene. Always follow guidance from your local public-health authority.

Is there a vaccine?

WHO states there is no licensed specific antiviral treatment or vaccine for hantavirus infection. ECDC notes no EU/EEA-authorized vaccine is currently available. If you have questions about vaccine availability in your country, check with your local public-health agency.

What should I do if I think I was exposed?

Contact a qualified healthcare provider or your local public-health agency. Outbreak Signal cannot give individual medical advice.

How reliable is this page?

Every factual claim links to a Tier 1 official source (WHO, CDC, ECDC, or PAHO). We do not publish numbers without a citation. Sources are listed at the bottom of this page with the date we accessed them.

How often is this page updated?

The page is in active editorial review during Phase 1. The Latest verified update block is changed only after a new WHO, CDC, ECDC, or PAHO statement has been read and cleared by a human reviewer. The body of the page is reviewed when a new WHO / CDC / ECDC / PAHO factsheet is released, and otherwise on a slower cadence appropriate to evergreen content.

Is Outbreak Signal a public-health agency?

No. Outbreak Signal is an independent information aggregator. We are not a healthcare provider, not a government agency, and not affiliated with WHO, CDC, ECDC, or PAHO. We aggregate and clearly cite their work.