The hantavirus-stricken cruise ship MV Hondius is seen at anchor at the port of Granadilla in Tenerife, Canary Islands, Spain, Monday, May 11, 2026. (AP Photo/Arturo Rodriguez)

Nebraska Medicine’s Davis Global Center is seen on Sunday, May 10,2026 in Omaha, Neb. where American passengers from the hantavirus-stricken cruise ship will quarantine. (AP Photo/Rebecca S. Gratz)

An oncologist traveling on the cruise ship at the center of a hantavirus outbreak says he’s the lone American isolated at a special biocontainment unit in Nebraska.

Dr. Stephen Kornfeld of Bend, Oregon, says he volunteered to help care for fellow passengers who began getting sick aboard the MV Hondius in April. He was among more than 120 passengers and crew evacuated from the ship, and flown to different countries to enter quarantine.

While 15 other Americans are being monitored at the National Quarantine Unit at the University of Nebraska Medical Center in Omaha, Kornfeld was the only one taken to a separate unit after a nasal swab he took on the ship tested positive for the virus.