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Diagnosis & Treatment

There is no specific antiviral drug or widely available vaccine for hantavirus. Early hospital care saves lives.

Last reviewed: May 2026 · Reviewed by HantaFAQs editorial team

How is hantavirus diagnosed?

Diagnosis starts with clinical suspicion — fever, muscle aches, and either respiratory (HPS) or kidney (HFRS) symptoms — combined with possible rodent exposure or travel history. Confirmation usually requires laboratory testing:

  • Serology (ELISA) — detects IgM and IgG antibodies against hantavirus. Most common confirmatory test.
  • RT-PCR — detects viral RNA, especially useful early in illness or for strain identification.
  • Immunohistochemistry — used post-mortem or on tissue samples.
  • Routine labs commonly show low platelet count, elevated white blood cells with "immunoblasts," elevated hematocrit, and abnormal kidney or liver markers.

Is there a cure or specific antiviral?

No. There is currently no FDA-approved antiviral treatment for hantavirus infection. Ribavirin has shown some benefit in HFRS but not consistently in HPS, and is not standard of care in most countries. A vaccine against Hantaan and Seoul viruses is used in parts of Asia, but no vaccine is widely available against Andes or Sin Nombre viruses.

What does treatment look like?

Treatment is supportive care, ideally in an intensive care unit for HPS:

  • Oxygen therapy or mechanical ventilation
  • Careful fluid management to avoid worsening pulmonary edema
  • Medications to support blood pressure (vasopressors)
  • For severe HPS: extracorporeal membrane oxygenation (ECMO) when available has improved survival in selected centers
  • For HFRS: kidney support, dialysis when needed, blood pressure stabilization

Why early hospital care matters

HPS can deteriorate from "feels like flu" to severe respiratory failure within hours. Patients identified and transferred early to centers experienced in hantavirus management have better outcomes. If you suspect hantavirus exposure and develop fever or shortness of breath, seek emergency care and tell the clinician about your exposure or travel history.

Recovery and long-term outlook

Survivors of HPS may experience fatigue, reduced exercise tolerance, and lung-function changes for months. HFRS survivors usually recover kidney function but may have lingering hypertension or kidney issues. Long-term follow-up is recommended.

For symptom checklists and emergency warning signs, see symptoms.

Sources

  • CDC — Hantavirus diagnosis and treatment guidance.
  • WHO — Hantavirus clinical management.
  • UpToDate / peer-reviewed literature on HPS and HFRS supportive care.