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Risk checklist ยท Not a diagnosis

Hantavirus Risk Checklist

This checklist does not diagnose infection. It helps you think through possible exposure, environment risk, symptom awareness, and when to seek medical advice without treating every rodent sighting as an emergency.

Last reviewed: May 12, 2026

Use this calmly

Hantavirus risk depends on context. Seeing a mouse once is different from cleaning rodent droppings, entering an enclosed dusty space with rodent signs, or developing symptoms after a relevant exposure.

1. Possible exposure

  • You cleaned or handled rodent droppings, urine, nests, dead rodents, or contaminated materials.
  • You swept, vacuumed, or disturbed dry dust in an area with rodent signs.
  • You stayed or worked in a cabin, shed, storage room, barn, or other closed space with possible rodents.
  • You had close contact with a suspected or confirmed Andes virus case and were told to monitor by health authorities.

2. Environment risk

  • Lower concern: seeing a mouse once with no droppings, nesting material, or dusty cleanup.
  • Higher concern: visible droppings, nests, urine stains, dead rodents, or heavy dust in a closed space.
  • Higher concern: dry sweeping or vacuuming before wetting the area with disinfectant.
  • Higher concern: sleeping, cleaning, or working for a long period in a rodent-contaminated enclosed space.

3. Symptom awareness

Symptoms can begin with fever, fatigue, muscle aches, headache, chills, dizziness, nausea, vomiting, diarrhea, or abdominal pain. More concerning later symptoms can include coughing, shortness of breath, chest tightness, or difficulty breathing.

Pay attention to timing and exposure

Fever, muscle aches, or shortness of breath after possible rodent exposure should be taken more seriously than symptoms with no plausible exposure.

4. When to seek medical advice

Seek medical advice promptly

Contact a healthcare professional if you develop fever, muscle aches, fatigue, abdominal symptoms, coughing, shortness of breath, or chest tightness after relevant rodent exposure or other evaluated exposure. Tell them clearly what happened and when.

If symptoms are severe, breathing is difficult, or you feel seriously unwell, seek urgent medical care or emergency services.

5. What to do next

After possible exposure

  • Write down when and where the exposure happened.
  • Note whether droppings, nests, dead rodents, or dust were present.
  • Avoid further dry sweeping or vacuuming of contaminated areas.
  • Use safer wet-cleaning guidance for future cleanup.

If symptoms develop

  • Contact a healthcare professional and mention the exposure.
  • Describe symptoms and when they started.
  • Follow local public-health guidance if you were part of a monitored group.
  • Use official sources for local instructions.

Prevention

Safer cleanup and rodent exposure reduction steps.

Risk checklist FAQ

Does this checklist diagnose hantavirus infection?+

No. This checklist does not diagnose infection. It helps readers organize exposure and symptom information before deciding whether to seek medical advice.

Is seeing a mouse once the same as high-risk exposure?+

No. Seeing a mouse once is different from cleaning rodent droppings, disturbing nesting material, or breathing dust in an enclosed rodent-contaminated space.

When should I seek medical advice after possible exposure?+

Seek medical advice if you develop fever, muscle aches, fatigue, abdominal symptoms, coughing, shortness of breath, or chest tightness after relevant rodent exposure or other evaluated exposure.

What should I tell a healthcare professional?+

Tell them what exposure happened, when it happened, whether rodents or droppings were present, whether dust was disturbed, and what symptoms developed.

Medical disclaimer

This page is for general information only and is not a substitute for professional medical advice, diagnosis, or treatment. For personal medical decisions or urgent symptoms, contact a healthcare professional or emergency services.