Independent surveillance · Editorially reviewed Data last verified: 21 May 2026 · 09:00 UTC
HantaOSINT Global Surveillance
Support Us
● MV Hondius cluster · Day 13 · US biocontainment retest negative
Report date: 14 May 2026 Status: Archived snapshot Risk: ECDC VERY LOW
Dashboard/ Daily Reports/14 May 2026

Nebraska Public Health Lab confirms US case false positive; outbreak total revised to 10

A consolidated 24-hour summary covering events reported between 13 May 06:00 UTC and 14 May 06:00 UTC.

Compiled from primary sources Editor: Hristo Stanchev Sources cited: 3 Events logged: 3
Confirmed / probable (cumulative)
10
-1 (US case retested negative)
Under investigation
0
none active
Deaths (cumulative)
3
±0 in past 24h
Countries involved
12
monitoring continues

What happened on 14 May

Nebraska Public Health Laboratory director Peter Iwen confirmed that the previously inconclusive US case had returned a definitive negative result on confirmatory retesting, characterizing the initial positive as a false positive. The patient, identified by CNN as Dr. Stephen Kornfeld, was transferred from biocontainment to standard quarantine. This revision reduces the WHO cluster total from 11 to 10 confirmed and probable cases. CDC subsequently updated its public statements to reflect zero confirmed Andes hantavirus cases in the United States.

Country tally was reconciled against Wikipedia and ECDC documentation, yielding 12 countries with confirmed or probable cluster cases versus the 14 previously listed by HantaOSINT. The discrepancy reflected inclusion of countries hosting only contact-traced individuals or asymptomatic returnees who tested negative. The MV Hondius continued its Atlantic transit toward Rotterdam, with arrival scheduled for 17 or 18 May per Oceanwide Expeditions communications.

24-hour event log (14 May 06:00 → next day 06:00 UTC)

14 May · 18:00
resolved

US case retested NEGATIVE; Kornfeld transferred from biocontainment

Nebraska Public Health Lab director Peter Iwen confirms first positive result was a false positive. Dr. Stephen Kornfeld tested negative on confirmatory retest and transferred from biocontainment to standard quarantine. Outbreak total revised down from 11 to 10.

Source: Nebraska Public Health Lab / University of Nebraska Medical Center / CNN
14 May
update

Country count reconciled: 12 (previously 14)

Editorial reconciliation against ECDC and Wikipedia documentation reduces tracked country count from 14 to 12. Removed entries reflected contact monitoring locations rather than confirmed-case jurisdictions.

Source: ECDC outbreak surveillance / Wikipedia cross-reference
14 May
update

MV Hondius continues transit; arrival 17-18 May

Vessel remains in Atlantic transit toward Rotterdam with 25 crew and 2 medics on board. Oceanwide Expeditions confirms no symptomatic individuals on board. Scheduled arrival 17 or 18 May. Disinfection protocols being finalized with RIVM.

Source: Oceanwide Expeditions / Dutch RIVM

Sources cited in this report

  1. Nebraska Public Health Lab statement via CNN, 14 May 2026. www.cnn.com
  2. CDC Situation Summary. www.cdc.gov
  3. ECDC outbreak surveillance page. www.ecdc.europa.eu

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