Ключевые слова: city, dangerous, disease, distance, dubai, dubai metro, face mask, flu, health, hygiene, infection, infectious, man, mask, masks, medicine, metro, modern, passenger, people, person, portrait, prohibited, protect, public, public transport, quarantine, respiratory, restrictions, safety, signage, signage icon, social, social distance, sticker, technology, train, transport, transportation, travel, uae,