The Zac Brown Band unveiled the cruise surprise just before they performed their 2021 song "Same Boat."
A North Carolina resident is among the Americans flown to Nebraska for monitoring after being on board the cruise ship at the center of a deadly hantavirus outbreak.
As the number of norovirus cases rise and hantavirus lingers on cruise ships, health officials advise passengers to take precautionary measures to avoid sickness.
The outbreak was reported to the CDC on Thursday, during the cruise ship's April 28 to May 11 voyage.
Six U.S. states are tracking nine residents for possible hantavirus infections.
More than two dozen people from at least 12 different countries left a cruise ship hit by a deadly hantavirus outbreak without contact tracing, officials say