90-Second Read: 5 People Leave Hantavirus Quarantine in Omaha

Five Americans who had been quarantining at a medical facility in Omaha for possible Hantavirus exposure returned to their home states on Monday, according to the Department of Health and Human Services. That was a condition that federal officials had put in place before anyone was allowed to leave the facility, the National Quarantine Unit at the University of Nebraska Medical Center. The 18 passengers were among a group of Americans on a cruise ship that became the center of a global Hantavirus outbreak last month.

Those who returned to their home states may be under constant surveillance for three more weeks. New York said on Monday that two state residents who were in Omaha had been transported home and "remain in quarantine with around-the-clock surveillance in private residences." They remain asymptomatic, according to the state. Federal officials said that state health departments would monitor the five returnees for symptoms every day and "maintain 24/7 oversight," but did not share details about what that would entail.

State health departments did not immediately respond to questions about the constant monitoring. Of the 13 people who remain at the Omaha facility, some have elected to stay longer, while others have yet to receive permission to return to their states. After being repatriated from the Canary Islands on May 11, they have been housed in federally funded facilities for observation, although none appear to have the disease.