LIVE FEED — DAILY UPDATES
◈ HANTAVIRUS SITUATION ROOM
GLOBAL OUTBREAK MONITORING SYSTEM // WAR QUAIL INTEL
LAST UPDATED
May 31, 2026 — Auto Update
SRC: WHO DON604 (May 28) | CDC HAN-528 | ECDC May 26 | CDC Briefing May 15 | PHAC May 16 | WA DOH May 16
SITREP // MV HONDIUS — ANDES VIRUS CLUSTER
As of May 25, ECDC’s May 24 update reports 12 cases (10 confirmed + 2 probable), 3 deaths, CFR 25% — one new confirmed case since May 21, no new deaths. Last WHO DON: DON601 (May 13). No new WHO DON issued. WA State 6 potential Andes cases still under investigation — none confirmed positive. MV Hondius decontamination ongoing Rotterdam. French national at Bichat Hospital Paris on ECMO as of May 13; no deterioration reported as of May 22. CDC: 0 US cases, 41 individuals under monitoring. 18 US passengers at UNMC Nebraska through May 31. WHO global risk: LOW. 42-day window closes ~Jun 22.
Confirmed Cases
13
11 confirmed + 2 probable (WHO DON604, May 27)
Confirmed Deaths
3
2 confirmed + 1 under investigation
⚠ 3RD DEATH PENDING CONFIRM
Case Fatality Rate
23%
Andes strain avg ~36–40%
Nations Affected
13+
13+ nations incl. Canada
AFFECTED NATIONS — MV HONDIUS CLUSTER
NATION
CASES
DEATHS
INTEL
STRAIN INTEL — ANDES VIRUS (ANDV)
ONLY known hantavirus capable of human-to-human transmission
Reservoir: Long-tailed pygmy rice rat — Patagonia & Andean foothills (Argentina/Chile)
Symptoms: Fever → pneumonia → ARDS → shock. Onset 1–8 weeks post-exposure
CFR: ~36–40% for Andes strain. 2026 cluster currently tracking at 23% (12 cases, 3 deaths)
No approved vaccine. Treatment is supportive — ICU, supplemental O₂, ECMO if severe
WHO global risk assessment: LOW — limited human-to-human spread in close contact only
2026 Outbreak Cases
1
Mild confirmed case (PCR+)
2026 Outbreak Deaths
0
No confirmed domestic deaths
Under Monitoring
41
CDC Level 3 — contact tracing
Endemic Annual Cases
30–40
HPS via Sin Nombre virus
2026 OUTBREAK — US STATUS
0 confirmed US cases as of CDC May 14 briefing. Nebraska case CONFIRMED NEGATIVE (Al Jazeera May 15 / WHO revision) — removed from global case count. 41 individuals under monitoring nationally across 3 groups: repatriated passengers at UNMC Nebraska and Emory Atlanta, early-disembark returnees, and flight contacts of confirmed cases. Risk to US public: extremely low. CDC HAN-528 advisory active.
STATE MONITORING — ENDEMIC HPS RISK ZONES
STATE
2026 CASES
DEATHS
STATUS
ENDEMIC HPS CONTEXT (SEPARATE FROM 2026 OUTBREAK)
Separate from the 2026 cruise ship outbreak: the U.S. sees ~30–40 endemic HPS cases annually, primarily in the Southwest from Sin Nombre virus via deer mice.
Primary vector: Deer mouse (Peromyscus maniculatus) — Southwest US
US HPS CFR: ~36% historically (Sin Nombre strain)
Prevention: N95 + rubber gloves when cleaning rodent-contaminated areas. Never dry-sweep. Wet with 10% bleach solution first.
MV HONDIUS — EVENT TIMELINE
May 18 2026
MV HONDIUS ARRIVES ROTTERDAM — Ship docks for full decontamination. WHO revised total: 10 cases (8 confirmed + 2 probable), 3 deaths, CFR 30%. Nebraska inconclusive confirmed NEGATIVE. No new cases or deaths. 42-day monitoring window continues through ~Jun 22.
May 19 2026
Situation stable. No new WHO DON. 11 cases, 3 deaths, CFR 27.3%. MV Hondius decontamination ongoing Rotterdam. 42-day monitoring window continues through ~Jun 22. WHO global risk: LOW.
May 20 2026
ECDC update: 11 cases (9 confirmed + 2 probable), 3 deaths, CFR 27.3%. No new WHO DON since DON601 (May 13). WA State 6 potential cases under investigation. MV Hondius decontamination ongoing Rotterdam.
May 21 2026
ECDC May 21: 11 cases (9 confirmed + 2 probable), 3 deaths, CFR 27.3% — stable. No new WHO DON. WA State 6 potential Andes cases under investigation (none confirmed positive). 18 US passengers at UNMC Nebraska through May 31.
May 22 2026
DAILY UPDATE — Stable. Total: 11 cases (9 confirmed + 2 probable), 3 deaths, CFR 27.3%. No new WHO DON. WA State 6 potential cases under investigation. 42-day window continues through ~Jun 22. WHO global risk: LOW.
May 23 2026
No new WHO DON. Global situation stable. ECDC monitoring ongoing. MV Hondius decontamination continues Rotterdam. 18 US passengers at UNMC Nebraska. WHO global risk: LOW.
May 24 2026
ECDC UPDATE — NEW CASE: 12 cases (10 confirmed + 2 probable), 3 deaths, CFR 25%. +1 confirmed case since May 21; no new deaths. Country of 12th case not yet attributed in available sources. No new WHO DON since DON601 (May 13). MV Hondius decontamination ongoing Rotterdam. (ECDC May 24 2026)
May 25 2026
DAILY UPDATE — Total: 12 cases (10 confirmed + 2 probable per ECDC May 24), 3 deaths, CFR 25%. No new deaths. No new WHO DON. WA State 6 potential Andes cases under investigation (none confirmed positive). 18 US passengers at UNMC Nebraska through May 31. MV Hondius decontamination continues Rotterdam. 42-day window through ~Jun 22. WHO global risk: LOW.