Carl Goldman tested positive for the new coronavirus after leaving the ship and arriving in the U.S. He is recovering in an isolation unit of the University of Nebraska Medical Center.
Pyongyang says it has mobilized to fight for its "national survival." Experts say North Korea's track record of fighting epidemics does not bode well for its handling of the coronavirus outbreak.
Many of the new cases are linked to a Christian sect in the city of Daegu. A woman who attended services there is listed as having more than 1,000 contacts.
Some factories are beginning to reopen, but labor shortages continue. In a recent poll of U.S. companies by Shanghai's American Chamber of Commerce, 78% said they lack staff to resume full production.
A total of 621 people from the cruise ship have now been confirmed to have COVID-19 — or about 20% of the 3,011 people who had been tested for the coronavirus disease as of Wednesday.
"It is important to know that these people being released from quarantine pose no health risk to the surrounding community," a CDC press officer said in a statement to NPR.
U.S. officials said the people infected with the virus were isolated from the other passengers. The two evacuation flights landed at military bases in California and Texas.