Ключевые слова: 3d, background, blue, breath, concept, corona virus, covid19, covit19, design, dirty, epidemic, equipment, face mask, filter, flu, health, healthy, illustration, medical, n95, n95 mask, object, person, pm 25, pm25, pollution, pollution mask, power, protect, protection, protective, safety, sign, surgical mask, symbol, technology, virus, white,