Ключевые слова: city, concrete, corona, coronavirus, covid19, day, daylight, daytime, disease, dutch, europe, face mask, government, grass, health, healthcare, holland, illness, lockdown, mandatory, mask, mondkapje, mouth, netherlands, no people, obligatory, outdoor, outdoors, platform, precaution, public transport, sign, south holland, station, street, tile, town, train, urban, virus, words, yellow,