Independent surveillance · Editorially reviewed Data last verified: 21 May 2026 · 09:00 UTC
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● MV Hondius cluster · Day 18 · ECDC 12 cases update; disinfection Day 2
Report date: 19 May 2026 Status: Archived snapshot Risk: ECDC VERY LOW
Dashboard/ Daily Reports/19 May 2026

ECDC 19 May: 12 cases total (9 confirmed + 2 probable + 1 inconclusive); Canada formally incorporated

A consolidated 24-hour summary covering events reported between 18 May 06:00 UTC and 19 May 06:00 UTC.

Compiled from primary sources Editor: Hristo Stanchev Sources cited: 3 Events logged: 3
Confirmed / probable (cumulative)
12
+1 (Canadian case formally classified as confirmed by ECDC)
Under investigation
1
pending lab
Deaths (cumulative)
3
±0 in past 24h
Countries involved
13
monitoring continues

What happened on 19 May

ECDC issued its 19 May surveillance update incorporating the Canadian confirmed case from 18 May, raising the cluster total to 12 cases comprising 9 confirmed, 2 probable, and 1 inconclusive. No new deaths since the previous update. ECDC noted that the identification of additional cases after passengers and crew return home is expected given the long Andes virus incubation period of up to six weeks. The risk to the EU/EEA general population remains assessed as very low.

MV Hondius disinfection at Rotterdam continued into a second day, with port authorities estimating completion by 21 May. The CDC reiterated zero confirmed Andes hantavirus cases in the United States. The 18 American passengers in Nebraska biocontainment requested to remain at the National Quarantine Unit through 31 May, reaching the 21-day point in their monitoring period; the CDC approved the request. Two additional Americans previously at Emory University Hospital in Atlanta were transferred to Nebraska following medical clearance.

24-hour event log (19 May 06:00 → next day 06:00 UTC)

19 May · 08:00
update

ECDC 19 May: 12 cases (9 confirmed + 2 probable + 1 inconclusive)

ECDC surveillance update incorporates the 18 May Canadian confirmation. Total now 12: 9 confirmed + 2 probable + 1 inconclusive. No new deaths. EU/EEA risk remains very low. ECDC notes additional cases expected during the long incubation period.

Source: ECDC outbreak surveillance, 19 May 2026
19 May
update

Rotterdam disinfection Day 2 of estimated 3-4

Vessel disinfection at enclosed Rotterdam port section continues. Estimated completion 21 May. Crew quarantine arrangements active in dedicated port facility. Decision on summer schedule still pending.

Source: Dutch RIVM / Port of Rotterdam Authority
19 May
update

18 Americans request extended Nebraska quarantine through 31 May

CDC approves request from 18 American MV Hondius passengers to remain at Nebraska National Quarantine Unit through 31 May, reaching the 21-day point in monitoring. Two passengers previously at Emory Atlanta transferred to Nebraska following medical clearance. All remain asymptomatic.

Source: CDC / University of Nebraska Medical Center

Sources cited in this report

  1. ECDC outbreak surveillance, 19 May 2026. www.ecdc.europa.eu
  2. CDC Situation Summary. www.cdc.gov
  3. RIVM Netherlands hantavirus information. www.rivm.nl

See methodology for the source-tiering framework and corrections log for any future amendments to this report.