Hantavirus in Utah.
Utah is part of the original Four Corners endemic zone but reports lower absolute case counts than its neighbors. Cases concentrate in San Juan, Kane, and Garfield counties. Utah Department of Health and Human Services publishes hantavirus updates and runs a clinician-alert program tied to deer-mouse density forecasts.
Frequently asked
How many hantavirus cases has Utah reported?
Utah has reported 2 confirmed hantavirus pulmonary syndrome cases year-to-date in 2026, against a 5-year average of 2.4 per year. Case counts vary year-on-year with rodent population cycles.
What rodent carries hantavirus in Utah?
Deer mouse (Peromyscus maniculatus). Sage steppe and pinyon–juniper across the southern half of the state.
Which strain causes hantavirus in Utah?
Sin Nombre virus is the dominant hantavirus strain in Utah. It causes hantavirus pulmonary syndrome (HPS) with case fatality typically 30–40%.
Related
Disclaimer. State case counts reflect what CDC NNDSS publishes. The state health department is the authoritative real-time source.