Ключевые слова: 2019ncov, again, airline, airplane, airport, background, banner, booking, business, chance, circumstances, concept, corona, coronavirus, covid, covid19, crisis, epidemic, flight, global, health, holiday, mask, medical, new, new beginning, new normal, open, opportunity, pandemic, passenger, passport, plane, quarantine, resuming, schedule, security, sign, ticket, time, tourism, transportation, travel, trip, vacation, vaccination, vaccine, virus, warning,