Ключевые слова: air, allergic, allergy, background, blue, boy, cancer, care, child, cold, contagious, cure, danger, disease, environment, epidemic, face, female, fever, flu, gesture, hand, health, hospital, ill, infection, kid, mask, medical, medicine, mouth, patient, people, person, pollution, prevention, problems, protect, protection, protective, respiratory, safety, show, sick, stop, surgical, symptom, unhappy, virus, wearing,