What is Hantavirus?
A comprehensive overview of hantavirus infections, transmission, symptoms, and global impact. This page is intended for educational and informational purposes only.
Overview
Hantaviruses are a family of viruses in the order Bunyavirales, family Hantaviridae. They are primarily spread by rodents and can cause serious disease in humans. The viruses were first recognized during the Korean War (1950-1953), when over 3,000 United Nations troops developed Korean Hemorrhagic Fever. The causative agent, Hantaan virus, was isolated in 1976 by Dr. Ho Wang Lee near the Hantan River in South Korea.
Clinical Syndromes
HFRS
- Caused by: Hantaan, Seoul, Dobrava, Puumala viruses
- Region: Europe and Asia
- Incubation: 1–6 weeks (typically 2–4 weeks)
- Mortality: 1–15% (varies by strain)
- Symptoms: Fever, hemorrhaging, kidney failure, headache, back pain, abdominal pain
- Cases/year: ~150,000–200,000 worldwide
HPS / HCPS
- Caused by: Sin Nombre, Andes, Laguna Negra, Choclo viruses
- Region: Americas (North, Central, South)
- Incubation: 1–5 weeks
- Mortality: 30–40%
- Symptoms: Fever, muscle aches progressing to severe respiratory distress, pulmonary edema
- Cases/year: ~300–500 reported in the Americas
How It Spreads
Rodent Contact
Primary route. Each hantavirus is associated with specific rodent hosts (deer mice, bank voles, rats).
Aerosolization
Inhaling dust contaminated with rodent urine, droppings, or nesting materials is the most common mode.
Direct Contact
Touching contaminated surfaces then touching eyes, nose, or mouth. Rodent bites (rare).
Person-to-Person
Only confirmed for Andes virus in South America. Not observed for other hantavirus strains.
Major Hantavirus Strains
| Virus | Syndrome | Primary Host | Region | Fatality Rate |
|---|---|---|---|---|
| Hantaan (HTNV) | HFRS | Striped field mouse | China, Korea, Russia | 5–15% |
| Seoul (SEOV) | HFRS (moderate) | Norway rat | Worldwide | 1–2% |
| Puumala (PUUV) | Nephropathia Epidemica | Bank vole | Europe, Scandinavia | <1% |
| Dobrava-Belgrade | HFRS | Yellow-necked mouse | Balkans, Central Europe | 5–12% |
| Sin Nombre (SNV) | HPS | Deer mouse | North America | ~36% |
| Andes (ANDV) | HPS | Long-tailed rice rat | South America | 25–40% |
| Laguna Negra | HPS | Vesper mouse | Paraguay, Bolivia | 10–20% |
Prevention & Treatment
Prevention
- Seal holes and gaps in buildings to prevent rodent entry
- Store food in sealed containers; dispose of garbage regularly
- Use wet-cleaning methods (bleach solution) for rodent-contaminated areas — never sweep or vacuum dry droppings
- Wear gloves and masks when handling potentially contaminated materials
- Trap and remove rodents from living areas
- Vaccination available in China and South Korea (Hantavax) for Hantaan/Seoul viruses
Treatment
- No specific antiviral approved for hantavirus
- Ribavirin has shown some benefit for HFRS if given early (IV)
- Supportive care is the mainstay: fluid management, dialysis for renal failure
- HPS/HCPS requires intensive care with mechanical ventilation and ECMO in severe cases
- Early recognition dramatically improves survival
Global Impact
China and Russia account for the vast majority of HFRS cases. In the Americas, cases are far fewer but the pulmonary syndrome carries a much higher fatality rate. Climate change, deforestation, and urbanization are changing rodent habitats and may alter future risk patterns.
⚠ Medical Disclaimer
This page is for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions regarding a medical condition. If you suspect hantavirus exposure, contact your local health department or emergency services immediately.