Hantavirus: What the public should know about the rare rodent-borne illness
Health officials are drawing attention to hantavirus, a rare but potentially fatal disease transmitted primarily through contact with infected rodent droppings, urine, or saliva.
First reported
By NBC News on May 4, 2026 at 8:06 AM EDT
Last update
May 4, 2026 at 8:06 AM EDT
5 sources write about this
Coverage Spectrum
This is not a truth score. It shows which parts of the media landscape are covering the story.
Left
40%
Center
60%
Right
0%
Primary
0%
In brief
Facts about this story
- 1
Hantavirus is primarily spread through inhalation of airborne particles from infected rodent droppings, urine, or saliva.
- 2
The deer mouse is the main carrier of hantavirus in the United States.
- 3
Hantavirus pulmonary syndrome carries a mortality rate of approximately 35–38 percent.
- 4
No FDA-approved vaccine or antiviral treatment specifically for hantavirus exists in the U.S.
- 5
The virus was first formally identified following a 1993 outbreak in the Four Corners region of the American Southwest.
How outlets are covering it
4 hr ago
What to know about hantavirus
“NBC News provides a public health explainer covering transmission risks, symptoms, and preventive measures for hantavirus.”
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Sources covering this story
5 sources write about this
5 articles tracked
What to know about the US military presence in Europe as Trump seeks drawdown of thousands of troops
May 4, 8:06 AM
Your State Brief
Impact by State
State Impact Score: 0-100
Higher scores mean more direct state-level policy, economic, safety, or service impact.
New Mexico
NM
Impact: High
Why: Highest cumulative hantavirus cases in US; epicenter of 1993 Four Corners outbreak; ongoing rural rodent exposure risks
Local angle: State health dept. rodent control campaigns; frequent cases in rural southwest counties
Sources: 3 local, 5 national · Federal impact: High
Arizona
AZ
Impact: High
Why: Key part of 1993 outbreak; high deer mouse populations; regular cases in rural and Native American communities
Local angle: Navajo Nation alerts; monsoon season rodent spikes
Sources: 3 local, 5 national · Federal impact: High
Colorado
CO
Impact: High
Why: 1993 Four Corners outbreak origin; cases in western rural areas; outdoor recreation exposure
Local angle: State epi reports; cabin cleaning warnings in Rockies
Sources: 2 local, 5 national · Federal impact: High
Utah
UT
Impact: High
Why: Four Corners region; persistent deer mouse reservoirs; cases tied to farm/cleanup activities
Local angle: Rural health advisories; national parks visitor risks
Sources: 2 local, 5 national · Federal impact: Medium
California
CA
Impact: Medium
Why: Significant case counts in Sierra Nevada/rural areas; deer mice widespread
Local angle: Central Valley farmworker alerts; wildfire cleanup risks
Sources: 2 local, 4 national · Federal impact: Medium
Washington
WA
Impact: Medium
Why: Cases in eastern rural counties; rodent control emphasized post-outbreaks
Local angle: State DOH campaigns; cabin/vacation home focus
Sources: 1 local, 4 national · Federal impact: Medium
Texas
TX
Impact: Medium
Why: Emerging cases in western rural areas; expanding deer mouse range
Local angle: Panhandle/west Texas health notices
Sources: 1 local, 4 national · Federal impact: Low
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