Ключевые слова: bus, caucasian, city, covid, covid19, disease, distance, epidemic, face, flu, grandpa, guy, health, infection, inside, interior, life, lifestyle, male, man, mask, measures, medical, modern, pandemic, passenger, pensioner, people, person, prevention, protection, protective, public, quarantine, safety, second, senior, shabby, social, streetcar, surgical mask, transport, travel, urban, virus, wave, worn, young,