Ключевые слова: background, bacteria, breath, cover, cure, danger, disease, doctor, epidemic, equipment, face, flu, health, healthcare, hospital, illness, infection, influenza, mask, medical, medicine, ncov, novel, object, outbreak, pandemic, pneumonia, pollution, prevention, protect, protective, quarantine, respiratory, risk, stack, surgical, swine, syndrome, text, top view, treatment, virus, wear, word, world,