Frequently asked questions about hantavirus

Q: Can I catch hantavirus from another person? A: Almost never. Person-to-person transmission has only been confirmed for Andes virus (a South American hantavirus), in close prolonged contact such as household members or healthcare staff. Most other hantaviruses (Sin Nombre, Hantaan, Puumala) are not transmitted person-to-person. Q: Can my pet give me hantavirus? A: Cats and dogs are not natural reservoirs. The reservoirs are wild rodents — deer mice, rice rats, voles, etc. Pet rodents (mice, rats, hamsters) bought from reputable breeders are very low risk; wild rodents kept as pets are higher risk. Q: Is hantavirus airborne like COVID? A: Not exactly. The virus aerosolizes when dust from rodent droppings or urine is disturbed (sweeping, vacuuming dry). It does not spread easily in casual indoor air the way respiratory viruses do. Q: How long after exposure do symptoms start? A: Typically 1 to 8 weeks after exposure, with most cases developing symptoms 2-4 weeks afterward. Q: Is there a treatment? A: Care is supportive — oxygen, fluids, ICU monitoring, dialysis when needed. Ribavirin has some evidence of benefit in HFRS (the renal form). No approved antiviral exists for HPS. Q: Should I be afraid of going camping? A: Casual camping in well-maintained sites is low risk. Risk increases with sleeping in long-closed cabins, contact with rodent infestations, or remote areas where you encounter rodent dwellings. Q: Does cooking destroy the virus? A: Hantavirus is fragile outside the host. Standard cooking destroys it. Foodborne transmission is rare. The main risk is not food but inhaled aerosols. Q: Can I be vaccinated? A: Inactivated vaccines for HFRS exist in Korea and China for Hantaan and Seoul viruses. There is no approved vaccine for HPS or other hantaviruses elsewhere in the world. Q: What should I do if I think I was exposed? A: Watch for fever, severe muscle aches, headache, and shortness of breath for up to 8 weeks. If symptoms appear, seek medical care urgently and mention the rodent exposure. Early ICU transfer saves lives. Q: Is the 2026 cruise outbreak a global emergency? A: WHO assesses the global risk as low. The cluster is exceptional and being investigated. No travel restrictions are recommended. Routine cruise itineraries do not pose hantavirus risk.