Hantavirus in Arizona.
Arizona consistently reports 3–5 confirmed Sin Nombre virus HPS cases annually, with the highest counts in Apache, Navajo, and Coconino counties. Most cases occur in adults exposed during cabin cleaning, woodpile handling, or rural occupational settings. Arizona Department of Health Services maintains a hantavirus surveillance program in cooperation with tribal health authorities and CDC.
Frequently asked
How many hantavirus cases has Arizona reported?
Arizona has reported 3 confirmed hantavirus pulmonary syndrome cases year-to-date in 2026, against a 5-year average of 3.6 per year. Case counts vary year-on-year with rodent population cycles.
What rodent carries hantavirus in Arizona?
Deer mouse (Peromyscus maniculatus). Northern Arizona high desert and ponderosa pine forests; rodent populations driven by winter precipitation.
Which strain causes hantavirus in Arizona?
Sin Nombre virus is the dominant hantavirus strain in Arizona. 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.