An American doctor initially suspected of hantavirus infection has tested negative on confirmatory PCR examinations and left the biocontainment unit at the University of Nebraska Medical Center.
Dr. Stephen Kornfeld, a 69-year-old oncologist from Oregon, received the results on May 13, 2026. He had been a passenger aboard the MV Hondius cruise ship when an initial faint positive screening triggered heightened isolation protocols.
Medical staff transferred Kornfeld into standard quarantine alongside 15 other American passengers from the vessel. None of the 16 report symptoms of any illness.
Serology testing on blood samples remains pending as of May 14, 2026. No Americans among the group have confirmed positive status for hantavirus, while nine total cases have been identified from the cruise overall.
At the time, it was felt like this is just some virus. And now, in retrospect, there is a question, could it have been hantavirus? But it’s just speculation. There’s no way to really know.
Dr. Stephen Kornfeld, the Oregon oncologist, offered that assessment of the early uncertainty surrounding his case.
The University of Nebraska Medical Center applied strict biocontainment measures immediately after the preliminary result. PCR testing detects viral genetic material with high precision, and two consecutive negative outcomes allowed the step-down in precautions.
Kornfeld and the other passengers continue under observation in quarantine. Hospital protocols require completion of all diagnostic steps before full release from monitoring.
Hantavirus spreads primarily through contact with infected rodents or their droppings. Initial symptoms often resemble common respiratory infections, which can complicate early identification during travel situations involving multiple nationalities.
CNN reported the negative PCR outcome and Kornfeld’s relocation from the specialized unit. Forbes provided live updates confirming the repeated negative findings and the absence of confirmed cases among American passengers.
The case illustrates how preliminary screenings prompt rapid protective actions while confirmatory laboratory work determines the true status. With PCR results now negative, attention centers on the remaining serology data expected in coming days.
Passengers from the MV Hondius remain in coordinated follow-up across medical facilities. No further positive indications have emerged among the American cohort since the May 13 update.
