United is contacting passengers who flew in and out of Dulles with Duncan and telling them how to contact health officials. United officials decline to say how many passengers were on the flights. The Brussels-to-Dulles flight used a Boeing 777 with 266 seats and the flight to Dallas used an Airbus A320 with 138 seats. United did a routine overnight ‘thorough cleaning’ after the flights:
Including cleaning of lavatories and galleys with heavy-duty all-purpose cleaners and wiping tray tables and armrests with disinfectant … We continue to clean and route the planes throughout our network as usual.