A passenger (L) hands his passport to an employee as he checks in at the counter of China Southern Airlines at Rome's Fiumicino airport for a flight returning to Wuhan, China, after it landed early on January 23, 2020. - China banned trains and planes from leaving a major city at the centre of a virus outbreak on January 23, seeking to seal off its 11 million people to contain the contagious disease that has claimed 17 lives, infected hundreds and spread to other countries. (Photo by Tiziana FABI / AFP)