Swiss man tests positive for hantavirus after returning from cruise linked to deadly outbreak

A Swiss man who returned from a cruise linked to a deadly hantavirus outbreak has tested positive and been isolated, as health officials say the strain involved can spread between people in rare cases — though the overall risk remains low.

Health authorities in Switzerland confirmed the man recently traveled aboard the MV Hondius, the cruise ship at the center of an outbreak that has already killed three passengers and sickened several others.

Swiss health officials said the man sought...