One of four Canadians who returned home from a cruise ship where there was a hantavirus outbreak received a “presumptive positive” test result for the virus, Canadian officials said Saturday.

The CDC said it is currently monitoring 41 people for hantavirus, including patients from the ship and those subsequently exposed.

The number of people being monitored for hantavirus in the United States has grown to 41, the Centers for Disease Control and Prevention said Thursday.

A Canadian has tested positive for hantavirus after disembarking a cruise ship. The individual is among four Canadians isolating in British Columbia. The Andes strain of the virus…