Ключевые слова: 19, air, airborne, breath, chemical, clean, contamination, corona, coronavirus, covid19, covit, covit19, diseases, dust, ebola, epidemic, face, female, filter, flu, gas, infection, isolated, mask, n95, nurse, outbreak, pathogen, person, piece, pm25, pollution, prevent, prevention, protect, protection, protective, putting, quarantine, respirator, respiratory, safety, smog, smoke, spread, toxic, virus, wear, white, woman,