Ключевые слова: adult, african, afro, air, allergy, american, background, bus, care, cold, copy, cough, coughing, danger, disease, disposable, epidemic, female, flu, health, ill, illness, infection, infectious, influenza, inside, lifestyle, male, man, mask, medical, pandemic, people, pneumonia, prevention, protection, protective, public, sick, sickness, space, text, transport, virus, wear, wearing, woman, young,