CDC MMWR (Nov 5, 2026) reports Andes virus outbreak linked to cruise ship: seven confirmed cases, three deaths, 88 U.S. residents monitored, no secondary U.S. infections detected

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Urgency: L4
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At a glance

CDC’s MMWR (published November 5, 2026) reports a cruise ship cluster of Andes virus infection with seven confirmed cases including three deaths, and describes identification and monitoring of 88 U.S. residents with potential exposure. CDC reports no secondary ANDV infections among monitored U.S. contacts.

High-consequence hantavirus cluster linked to cruise travel; CDC monitored 88 U.S. residents and detected no secondary U.S. infections, per Nov 5 MMWR.

CHRONOS Wire · November 6 · Alert 10

What happened

CDC published an MMWR on November 5, 2026 describing a cluster of Andes virus infections linked to a cruise ship: seven confirmed cases including three deaths, and 88 U.S. residents were identified and monitored with no secondary infections detected among monitored contacts in the United States.

Why it matters

Andes virus can transmit between people and causes severe disease; documented deaths and international travel exposures require immediate public health follow-up for contacts and diagnostics.

CHRONOS Bottom Line

An Andes virus cluster on a cruise ship caused seven confirmed severe illnesses, including three deaths; 88 U.S. residents with potential exposure were monitored and CDC reported no secondary ANDV infections among those monitored in the United States.

Full detail

What changed

CDC released a formal MMWR summary (published November 5, 2026) documenting a cruise-ship linked Andes virus cluster with seven confirmed cases, three deaths, and the monitoring of 88 U.S. residents; the report states no secondary infections were identified among monitored U.S. contacts.

What is genuinely new

CDC’s MMWR (Nov 5, 2026) formally documents the cruise-ship linked ANDV cluster with seven confirmed cases, three deaths, and the monitoring of 88 U.S. residents, and reports that no secondary infections were identified among monitored U.S. contacts.

Detailed analysis

Andes virus (ANDV) is notable as the only hantavirus with documented person-to-person transmission. The MMWR documents a cluster associated with a cruise ship that resulted in severe respiratory illness and three deaths; 88 U.S. residents were monitored for potential exposure. CDC coordinated laboratory validation and international partner monitoring; the report states no secondary infections were identified among monitored U.S. contacts as of publication.

U.S. Impact

No material U.S. impact identified · Confidence: High.