Hantavirus
Symptoms, transmission, prevention, and global outbreak tracking.
Last updated, May 7, 2026
Overview
A family of viruses carried by rodents that can cause fatal respiratory disease in humans.
First identified during a 1993 outbreak in the Four Corners region of the southwestern United States, hantaviruses are now recognized on every inhabited continent. The primary human illness, Hantavirus Pulmonary Syndrome, carries a fatality rate of approximately 36%.
Transmission occurs through inhalation of aerosolized virus particles from rodent urine, droppings, or saliva. The virus is not spread person-to-person in the Americas.
36%
Case fatality rate
200+
Annual US cases
1993
First identified
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