In a press briefing Friday, officials for the World Health Organization announced that the case count of the hantavirus outbreak on the cruise ship MV Hondius in the South Atlantic has shrunk from 11 cases to 10 after a previously reported US case was found to be a false positive.
That US case was originally reported by US health officials as "mildly positive," and the WHO had considered it "inconclusive," but still counted in the outbreak as a case in the agency's May 13 outbreak report and in a briefing on May 14.
The inconclusive case was in Dr. Stephen Kornfeld, an American doctor aboard the ship who helped respond to the outbreak after the ship's doctor became ill. In an interview with CNN earlier this week, Kornfeld explained that he and others on board had taken nasal swabs early in May, before evacuation, and those swabs were sent for PCR testing in the Netherlands. Two labs in the Netherlands processed Kornfeld's swabs; one lab reported a negative result, and the other reported a faint positive.
The Guardian 
DW News