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History of hantavirus outbreaks

Every major hantavirus outbreak from the 1993 Four Corners discovery to the active 2026 MV Hondius cluster — what happened, why it mattered, and what each one taught public health.

Outbreaks
5
Cases (cumulative)
125
Deaths (cumulative)
55
  1. 1993 · Sin Nombre virus (SNV)

    Four Corners outbreak

    Four Corners region (NM, AZ, CO, UT) (United States)
    Cases
    48
    Deaths
    27
    CFR
    56%

    An unexplained cluster of acute respiratory illness in young, healthy Navajo adults forced the discovery of a new hantavirus genus in the Americas. Sin Nombre virus, carried by the deer mouse (Peromyscus maniculatus), was identified within months. The outbreak founded modern hantavirus surveillance in the New World.

    What it taught us
    • ·Hantavirus existed in the Americas — the Old World assumption was wrong.
    • ·Aerosolised rodent excreta can drive an outbreak without direct rodent contact.
    • ·Genome-first identification (PCR) became the new template for unknown viral pneumonia.
    Source · CDC — Tracking a Mystery Disease
  2. 1996 · Andes virus (ANDV)

    El Bolsón / Patagonia ANDV cluster

    El Bolsón, Río Negro Province (Argentina)
    Cases
    20
    Deaths
    11
    CFR
    55%

    The defining outbreak of person-to-person hantavirus transmission. A physician who treated an index case fell ill in Buenos Aires, hundreds of kilometres from any rodent reservoir. Genetic sequencing tied every case to a single source. ANDV remains the only hantavirus with reproducible documented human-to-human spread.

    What it taught us
    • ·ANDV breaks the rodents-only rule that defined hantavirus epidemiology.
    • ·Healthcare workers need PPE protocols equivalent to viral haemorrhagic fever response.
    • ·Contact tracing windows for ANDV must extend to 42 days from last exposure.
    Source · Wells et al., EID 1997
  3. 2012 · Sin Nombre virus (SNV)

    Yosemite tent cabin outbreak

    Curry Village, Yosemite National Park (United States)
    Cases
    10
    Deaths
    3
    CFR
    30%

    An unusual cluster traced to insulated 'signature' tent cabins where deer mice nested between exterior canvas and interior wall liners. The accommodation design effectively created a rodent aerosol generator. The National Park Service closed and demolished the affected cabins; CDC issued a global alert because exposed visitors had returned to 39 countries.

    What it taught us
    • ·Built-environment design can amplify hantavirus risk far beyond ambient rodent presence.
    • ·Tourism creates a global contact-tracing problem from a single localised exposure.
    • ·Lookback notifications need rapid multilingual public-health infrastructure.
    Source · Núñez et al., EID 2014
  4. 2018–2019 · Andes virus (ANDV)

    Epuyén ANDV outbreak

    Epuyén, Chubut Province (Argentina)
    Cases
    34
    Deaths
    11
    CFR
    32%

    The largest documented person-to-person hantavirus chain in history. Forty-day quarantines were imposed on entire households; the regional health system shifted to ring containment. Argentine authorities documented at least three transmission generations from the index case at a birthday gathering, decisively confirming ANDV's airborne person-to-person potential.

    What it taught us
    • ·ANDV can sustain at least three sequential generations of human transmission.
    • ·Indoor close-contact events (parties, religious gatherings) are the primary chain amplifiers.
    • ·Empirical 40+ day quarantine protocols work and are now standard for ANDV exposures.
    Source · Martínez et al., NEJM 2020
  5. 2026 · Andes virus (ANDV)

    MV Hondius cruise ship outbreak (active)

    MV Hondius (Dutch-flagged expedition cruise) (Multi-country)
    Cases
    13
    Deaths
    3
    CFR
    23%

    A confined-environment ANDV cluster that began on a 240-passenger expedition cruise departing Ushuaia, Argentina on 1 April 2026. By 8 May 2026, confirmed cases span 11 countries on four continents as disembarked passengers return home. This is the first documented ANDV outbreak in a moving international transport setting and the first to trigger coordinated multi-country contact tracing.

    What it taught us
    • ·Maritime IPM and rodent-control standards (SSC/SSCEC) need real-world stress-testing.
    • ·International Health Regulations 2005 reporting works — but multi-country tracing scales poorly.
    • ·Expedition cruises carry passengers from regions with no historical hantavirus literacy; preparedness is uneven.
    Source · WHO DON-599
LiveСвежие новости об активной вспышке MV HondiusЖивое досье — обновляется по мере появления новых сообщений.
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