U.S. regulators are moving ahead with a new rule that imposes new burdens on airlines and their staffs to identify and report to federal authorities passengers who are ill and may be subject to quarantine, a response to the Ebola outbreak in 2014.

In a final rule published on Jan. 19, the U.S. Centers for Disease Control and Prevention updates the agency’s quarantine authority for the first time in several decades. During the 2014 Ebola outbreak in West Africa, four patients were diagnosed with the virus and isolated for treatment in the United States after traveling to the affected areas. One died.