Ключевые слова: adult, alone, ascending, city life, cold, corona virus, covid19, czech republic, descending, epidemic, europe, face mask, hradcanska, lifestyle, lock down, mask, old, outdoors, pandemic, pedestrian, people, prague, public health, public transportation, quarantine, railways, safety, snow, snowing, station, street, town, tram, traveling, urban, virus, waiting, walking, winter, women,