FILE – In this Feb. 11, 2020, file photo, the Grand Princess cruise ship passes the Golden Gate Bridge as it arrives from Hawaii in San Francisco. Scrambling to keep the coronavirus at bay, officials ordered the cruise ship to hold off the California coast Thursday, March 5, to await testing of those aboard, after a passenger on an earlier voyage died and at least one other became infected. (Scott Strazzante/San Francisco Chronicle via AP, File)

DES MOINES, Iowa (AP) – Officials say 22 Iowans are among the thousands of passengers and crew who were quarantined on a cruise ship docked in Northern California, and most of them are preparing to return home.

Gov. Kim Reynolds said Tuesday that 18 of the Iowans will be flown home on a government-chartered plane and kept in isolation in their homes.

None of them have shown symptoms of the COVID-19, the disease caused by the coronavirus, but they will be screened before and after the flight. At least 21 of the roughly 3,500 passengers and crew on the Grand Princess cruise have tested positive for the disease.