Ключевые слова: airport, avoid disease, background, billboard, blur, city, contagious, coronavirus, covid19, crowd, disease, distancing, epidemic, green, health, icon, indoor, infected, infection, mass gatherings, outbreak, pandemic, passenger, passengers, people, person, physical, population, precaution, prevention, preventive measures, protection, quarantine, recommendations, red, safety, seat, selfshielding, social distancing, spread, tourism, transmission, transportation, travel, travel restrictions, travelers, uninfected, virus, warning,