Korean Air will require all passengers traveling to the United States to submit an Ebola-related declaration confirming they have not visited or stayed in the Democratic Republic of the Congo within the previous 21 days, as part of new U.S. health measures. The airline said Monday the requirement will take effect for flights departing at or after 1:59 p.m. Wednesday, following an administrative order issued by the U.S. Centers for Disease Control and Prevention to prevent the spread of Ebola from the Democratic Republic of Congo. The measure applies to all U.S.-bound routes and covers U.S. citizens, residents, airline crew members, visitors and passengers transiting through the United States en route to other countries. Travelers who have visited Congo during the past 21 days will not be allowed to board U.S.-bound flights. Even passengers who only changed planes at an airport in the country without leaving the airport will be considered to have traveled to Congo and face entry restrictions. Passengers must complete and submit one declaration per person before checking in on their departu