Frequently asked — Hantavirus in Boise

Is hantavirus a current risk in Boise?

Boise, Idaho is an endemic region for hantavirus. Current risk level is minimal, with 0 active and 0 year-to-date confirmed cases. Cases occur in agricultural workers across the Snake River plain.

Which hantavirus strain is found in Idaho?

The primary circulating strain in Idaho is Sin Nombre, carried by the deer mouse. Pandemic Watch tracks every official Sin Nombre alert from CDC, PHAC, UKHSA, ECDC, and WHO and surfaces them on this page in real time.

How is hantavirus transmitted in United States?

Hantavirus is transmitted primarily through inhalation of aerosolized rodent urine, droppings, or saliva — most commonly when disturbing rodent-infested enclosed spaces such as cabins, sheds, or barns. Direct rodent bites are a rarer transmission route. There is no documented sustained human-to-human transmission of Sin Nombre.

What are the symptoms of hantavirus infection?

Early symptoms (1–8 weeks after exposure) include fever, fatigue, severe muscle aches in the thighs, hips, and back, headache, dizziness, chills, and abdominal issues. Late-stage Hantavirus Pulmonary Syndrome (HPS) progresses rapidly to coughing and shortness of breath caused by fluid in the lungs. Anyone with these symptoms and a possible rodent exposure should seek emergency care immediately.

How can residents and travelers in Boise protect themselves?

Seal entry points to keep rodents out of homes, set traps, and never sweep or vacuum dry rodent droppings. Wet down contaminated areas with a 10% bleach solution, wear an N95 respirator and gloves during cleanup, and ventilate enclosed spaces for 30+ minutes before entry. Travelers should avoid sleeping in cabins with visible rodent activity.

Where does Pandemic Watch get Boise hantavirus data from?

All alerts on this page are pulled directly from official public health sources: CDC NNDSS for the United States, PHAC NML for Canada, UKHSA for the United Kingdom, ECDC for Europe, and WHO Disease Outbreak News globally. Feeds are ingested every 15 minutes and matched against Boise, Idaho, and United States.