Short answer
Most hantaviruses spread from infected rodents to people through contaminated urine, droppings, saliva, nesting material, or dust. Andes virus is the only hantavirus official sources describe as spreading person-to-person, and that spread requires close contact with a sick person.
Primary rodent-to-human routes
- Inhaling aerosolized virus particles from dried or disturbed rodent urine, droppings, or nesting material — the most common route described by official sources
- Direct contact with fresh rodent urine, droppings, or saliva followed by touching the eyes, nose, or mouth
- Touching contaminated surfaces and then touching mucous membranes
- Rarely, a bite from an infected rodent
Official sources consistently describe inhalation of aerosolized particles as the primary route. This is why dry sweeping and vacuuming rodent contamination without prior disinfection are specifically warned against.
What creates aerosolization risk
Aerosolization risk increases when contaminated material is disturbed without pre-treatment. Dry sweeping, vacuuming, or using compressed air around rodent waste can suspend viral particles. CDC and state guidance emphasize wetting the area with disinfectant before any cleaning to reduce this risk. Enclosed or poorly ventilated spaces concentrate aerosolized particles, making ventilation before entry a key prevention step. See mouse droppings cleanup guidance for step-by-step disinfection protocol.
High-risk activities and settings
Official sources identify the following as higher-risk contexts for rodent-to-human exposure: cleaning long-closed cabins, sheds, barns, storage spaces, or attics with rodent activity; disturbing nesting material; agricultural and farm work; pest-control work in infested structures; camping in areas with visible rodent activity; and, for Andes virus, close quarters with a sick person such as cabin sharing on a ship. See hantavirus prevention for exposure-reduction guidance.
Andes virus person-to-person exception
CDC identifies Andes virus as the only hantavirus known to spread from person to person. WHO and ECDC describe this as limited human-to-human transmission requiring close contact. Official sources link confirmed person-to-person cases to household exposure, intimate partner contact, and enclosed shared spaces such as ship cabins — not casual public interaction.
The MV Hondius 2026 outbreak is linked to Andes virus and includes confirmed person-to-person transmission. Official risk assessments from WHO, ECDC, and CDC describe broad public risk as low, very low, or extremely low, reflecting that this spread requires close contact rather than airborne or casual transmission. See Andes virus person-to-person spread for monitoring and contact definitions.
What is not a transmission route
- Casual proximity to an infected person (for hantaviruses other than Andes virus)
- Foodborne or waterborne transmission
- Mosquitoes, ticks, fleas, or other insect vectors
- Domestic cats and dogs as primary transmission sources (pets may bring rodents indoors, but are not a direct source)
- Standard respiratory droplet spread comparable to influenza or COVID-19, for hantaviruses other than Andes virus
Sources reviewed for this page
Frequently asked questions
Does every hantavirus spread between people?
No. CDC identifies Andes virus as the only hantavirus known to spread person-to-person. All other hantaviruses are understood to require rodent-to-human exposure, not person-to-person contact.
Is the general public at high risk from the MV Hondius outbreak?
Current official sources including WHO, ECDC, and CDC assess broad public risk as low, very low, or extremely low. This reflects that Andes virus requires close contact to spread, not casual proximity or brief incidental interaction.
Can I get hantavirus from touching a dead rodent?
Yes, potentially. Direct contact with a dead infected rodent or its blood, urine, or droppings can be a route of exposure, especially if a person then touches their eyes, nose, or mouth. CDC recommends wearing gloves and using wet disinfection methods when handling dead rodents or contaminated materials.
What should I do if I find rodent droppings in my home?
Do not sweep or vacuum dry droppings. Ventilate the area for at least 30 minutes, wear gloves, and spray the material with disinfectant until thoroughly wet before wiping up. See mouse droppings cleanup guidance for the full protocol.
Is it safe to be in the same room as someone with hantavirus?
For hantaviruses other than Andes virus, person-to-person spread has not been documented, so ordinary proximity is not a recognized risk. For Andes virus, official sources describe spread as requiring close prolonged contact. Brief or incidental room-sharing is not classified as high-risk exposure by current guidance.
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Report a correctionPrimary sources reviewed
CDC, WHO, and ECDC official public-health pages were reviewed for this build. Current outbreak counts use official outbreak updates; evergreen pages use official background and guidance pages.