Ключевые слова: air, asian, breathing, care, chemical, concept, danger, disease, epidemic, face, flu, gesture, hand, health, health care, illness, infected, infection, infectious, influenza, male, man, mask, medical, medical mask, medicine, no, pandemic, people, person, pneumonia, pollution, prevention, protect, protection, protective, protective mask, quarantine, safety, showing, stop, virus, wear, white, winter,