Another CDC team has been dispatched to meet returning American passengers in Nebraska, the agency said. At a briefing Saturday, a CDC official said that
the 17 US passengers none of which have symptoms will be transported to the University of Nebraska Medical Center, which is home to the the National Quarantine Unit, a federally funded facility.
https://edition.cnn.com/2026/05/08/health/cruise-ship-hantavirus-passengers
I can find nothing saying any American has shown symptoms, let alone been confirmed as having the virus.
A total of 8 cases have symptoms from all countries:
https://www.who.int/emergencies/disease-outbreak-news/item/2026-DON600
That includes
a Dutch couple (cases 1 and 2), a
Brit in ICU in Johannesburg (case 3),
a German woman who died on the ship (case 4),
the ship's British doctor, now in hospital in the Netherlands (case 5), a
British guide on the ship, now in hospital in the Netherlands (case 6),
a Swiss man, now in Switzerland (case 7), and
a Brit now on Tristan da Cunha (case 8).