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Andes Virus
Andes virus: the hantavirus known for limited person-to-person spread
Andes virus is a hantavirus found in South America. It is important in outbreak intelligence because it is the hantavirus with documented person-to-person transmission under close-contact conditions.
Why Andes virus matters
Most hantaviruses are not known to spread from person to person. Andes virus is the key exception cited by public health authorities, making confirmed Andes virus events especially important for contact tracing and monitoring.
Transmission context
Rodent exposure remains central to hantavirus prevention, but Andes virus events require additional attention to close contacts, shared environments and travel-linked exposure histories.
Incubation and monitoring window
CDC guidance lists signs and symptoms of HPS due to Andes virus as appearing 4 to 42 days after exposure. This long window is why public health teams may monitor exposed passengers, household contacts or close contacts for several weeks after the last possible exposure.
How person-to-person spread is understood
Public health agencies describe Andes virus person-to-person transmission as limited and usually connected with close contact, prolonged time in shared enclosed spaces, direct physical contact, or exposure to body fluids from a symptomatic patient. It is not treated the same way as highly transmissible respiratory viruses.
Public health response
Response work focuses on rapid case confirmation, isolation and care for symptomatic patients, contact tracing, exposure classification, and active monitoring of people who shared high-risk travel, cabin, household or care settings with confirmed or probable cases.
Outbreak monitoring
HantaWorld tracks verified Andes virus reports alongside other hantavirus intelligence, separating confirmed cases from monitored contacts and suspected reports.
How HantaWorld classifies Andes virus events
We separate laboratory-confirmed cases, probable cases, suspected cases, inconclusive findings, deaths, monitored contacts and repatriated passengers. This prevents maps and dashboards from counting every monitored person as an infection while still showing where public health follow-up is active.