On 16 December 2020, the U.K. Foreign, Commonwealth and Development Office (FCDO) issued updated travel advice for Argentina, which reads in part as follows: “All arrivals into the City of Buenos Aires must take a COVID-19 test within 72 hours of arriving. Online booking is required. Children under the age of 12 are exempted. Full details on this requirement including information on where you can take the test and how to book are available in the City of Buenos Aires website (in Spanish).”