Ключевые слова: abroad, airplane, airport, border, business, citizen, citizenship, control, corona, coronavirus, country, covid19, customs, document, documentation, flu, foreign, freedom, global, hazard, holiday, id, identification, identify, identity, immigration, infection, influenza, international, national, novel, official, outbreak, passage, passport, personal, protective, quarantine, security, tourism, tourist, travel, traveler, trip, vacation, virus,