Reservoir ecology
The deer mouse layer explains a major U.S. reservoir relationship. It should be read as ecology, not as a map of infected mice or human cases.
CDC identifies the deer mouse as the common U.S. reservoir associated with Sin Nombre virus.
State agencies in New Mexico and California also emphasize deer mouse exposure in prevention guidance.
Reservoir range does not prove current infection in rodents at a specific site.
Deer mice are widespread, and only some individual animals may be infected. Human risk usually involves exposure to contaminated urine, droppings, saliva, or nesting materials, especially when dust is disturbed.
A deer mouse map can support prevention education, but it cannot replace inspection, cleanup guidance, or public health consultation.
There is no public static dataset that can turn a reservoir range into an exact household risk score. Weather, rodent abundance, building conditions, ventilation, and cleanup behavior all matter.
Source transparency
Links open official public health or agency-published source material used for the summaries on this page.
Centers for Disease Control and Prevention
General description of hantavirus diseases, transmission, reservoirs, symptoms, and risk reduction.
Broad public overview; local health departments remain the source for local reporting requirements and investigations.
CDC Emerging Infectious Diseases
U.S. hantavirus and rodent reservoir relationships.
Reservoir presence does not mean a specific animal is infected or that human cases are present.
New Mexico Department of Health
New Mexico case summaries, prevention resources, and cumulative historical context.
State page summaries can update; this project stores the reviewed snapshot date with each derived record.
California Department of Public Health
California prevention guidance, deer mouse context, and links to CDPH map and surveillance PDFs.
This MVP links to CDPH surveillance products instead of extracting county-level values.