Ключевые слова: adult, casual, caucasian, city, city life, communication, concept, epidemic, europa, females, flu, global, health, holding, infection, lifestyle, male, man, mask, metro, metropolitan, millennial, mobile, modern, multimedia, online, pandemic, passenger, phone, platform, prevention, protect, protection, protective, quarantine, respiratory, safety, smart, smartphone, station, subway, system, technology, train, transport, travel, urban, using, virus, woman,