The US Centers for Disease Control and Prevention (CDC) has introduced a new requirement for all international flights to the United States because of an Ebola outbreak in the Democratic Republic of the Congo. Under an order signed on October 22, passengers must declare that they have not been in the Democratic Republic of the Congo during the 21 days before their journey.
The requirement applies to flights departing for the United States from 11:59 p.m. Eastern Time on November 3. It covers US citizens, green-card holders and transit passengers traveling through the United States to third countries. Passengers flying to the United States from Türkiye, Russia and the CIS countries will also have to complete the declaration.

Airlines must prevent passengers without a completed declaration from boarding and retain copies for at least 42 days after arrival. The document can be signed on paper, using a verified electronic signature or by selecting the relevant option in the airline's system.
The order remains in effect until December 18, 2026, unless it is repealed, amended or extended. Knowingly providing false information may result in a fine and imprisonment.