Eight people infected in the hantavirus outbreak aboard the MV Hondius cruise ship have tested positive for the Andes virus, the only strain transmitted between humans, the World Health Organization said Wednesday.

The 17 U.S. passengers evacuated from the MV Hondius would first be taken to the University of Nebraska Medical Center, which has a federally funded quarantine facility.

The UK, US and EU are asking all citizens returning home from the virus-hit MV Hondius to self-isolate for about six weeks.