Ключевые слова: air, allergy, asia, asian, breath, care, child, clean, clinic, day, disease, dust, epidemic, face, family, female, flu, health, human, hygienic, ill, infection, influenza, kid, life, mask, medical, medicine, mother, mouth, parent, people, person, pm25, pollution, prevention, protect, protection, protective, safe, sick, son, spread, unhealthy, virus, wear, white, woman,