Sortable Index
A date-sorted index of the hantavirus events tracked in this build — the 2026 MV Hondius cruise-linked cluster at the top of the index, with historical milestones below: the 1993 Four Corners outbreak that defined hantavirus pulmonary syndrome, the 2012 Yosemite Curry Village cluster, and the most recent CDC cumulative summary.
Key facts
The case table on this page mirrors the index on the homepage. Each row is one published record — a recognized outbreak, a surveillance milestone, or a cumulative summary. Confirmed-case rows describe specific clusters; surveillance rows describe agency-level activity and should not be read as individual cases.
Each record carries one of four classifications, aligned with the CDC/CSTE surveillance framework.
Sorting newest first surfaces the most recent CDC activity and advisory posture. Sorting oldest first reads the index as a chronology, starting with the 1993 Four Corners cluster that prompted the original CDC investigation.
Each row points back to one of three public-health source families.
It is not a real-time surveillance feed. It does not name individual patients. It does not estimate unreported cases — and it deliberately leaves gaps visible rather than backfilling with guesses.
CASE INDEX
| Date | Location | Status | Cases | Deaths | Source | Signal |
|---|---|---|---|---|---|---|
| 2026-05-13 | MV Hondius — multi-country South America itinerary International | confirmed | 8 | 3 | WHO | WHO Disease Outbreak News third update on the MV Hondius hantavirus cluster: 11 linked records total — 8 laboratory-confirmed, 2 probable, and 1 inconclusive U.S. repatriated traveler. Andes virus identified as the agent of concern. Investigation continues across multiple Member States. |
| 2026-05-08 | MV Hondius cluster — WHO update International | surveillance | 0 | 0 | WHO | Second WHO Disease Outbreak News update on the MV Hondius cluster raised the confirmed count and described enhanced surveillance for returning passengers across home jurisdictions. |
| 2026-05-05 | United States — CDC monitoring posture United States | surveillance | 0 | 0 | CDC | CDC announced enhanced case-finding for returning MV Hondius passengers and issued clinician-awareness guidance through HAN. No confirmed U.S. Andes-virus cases linked to the cruise to date; the single U.S. record remains inconclusive. |
| 2026-05-04 | MV Hondius cluster — initial WHO report International | surveillance | 0 | 0 | WHO | Initial WHO Disease Outbreak News report on a hantavirus cluster linked to the MV Hondius cruise itinerary following Member State notification on May 2. Two confirmed cases and five suspected cases described at first publication. |
| 2025-03-15 | United States United States | surveillance | 0 | 0 | CDC | CDC and state health departments expanded clinician-awareness messaging on hantavirus pulmonary syndrome following a high-profile case in the rural Southwest that drew renewed national attention. |
| 2023-12-31 | United States — cumulative reported total United States | surveillance | 864 | 311 | CDC | CDC's Reported Cases of Hantavirus Disease page lists 864 laboratory-confirmed cases of hantavirus pulmonary syndrome in the United States through 2023, with historical case-fatality near 36 percent. |
| 2012-08-16 | Yosemite National Park — Curry Village United States | confirmed | 10 | 3 | CDC | Ten confirmed HPS cases were tied to the Signature double-walled tent cabins at Curry Village between June and August 2012. Deer-mouse infestation was identified between the cabin walls; the cabins were dismantled and roughly 22,000 visitors were notified. |
| 1995-07-26 | United States United States | surveillance | 0 | 0 | NNDSS | Hantavirus pulmonary syndrome added to the U.S. list of nationally notifiable diseases, formalizing weekly state-to-CDC case reporting through the National Notifiable Diseases Surveillance System. |
| 1993-11-30 | CDC — Atlanta, GA United States | surveillance | 0 | 0 | CDC | Sin Nombre virus identified as the etiologic agent of the Four Corners outbreak. The deer mouse (Peromyscus maniculatus) confirmed as the primary U.S. reservoir. |
| 1993-05-14 | Four Corners region (AZ · CO · NM · UT) United States | confirmed | 17 | 13 | CDC | Cluster of unexplained adult respiratory deaths in the Four Corners region — primarily on the Navajo Nation — prompted the CDC investigation that led to recognition of hantavirus pulmonary syndrome as a new clinical syndrome. |
Related on HantaScan
Primary Sources