Seventeen Americans evacuated from a hantavirus-hit cruise ship docked off Spain’s Canary Islands were being airlifted to the United States late Sunday, the Department of Health and Human Services said.

One American experiencing mild symptoms and another who tested “mildly PCR positive” for the Andes strain of hantavirus were traveling in the plane’s biocontainment units, according to the HHS statement, which said the move was “out of an abundance of caution.”

The flight comes after the cruise ship Hondius docked early Sunday at Tenerife, one of Spain’s Canary Islands, where the nearly 150 passengers and crew from nearly two dozen nations disembarked the vessel.

Cruise operator Oceanwide Expeditions had said that after disembarking, all individuals were to immediately board awaiting aircraft for repatriation.