Ключевые слова: air, air pollution, allergies, allergy, asian, bangkok, care, child, concept, cough, danger, dirt, disease, dust, environment, face, female, flu, girl, health, hygienic, hygienic mask, illness, kid, mask, medical, medical mask, outdoor, people person, pm25, polluted, pollution, problem, protect, protection, protective, safety, school, sick, stressed, student, thai, tired, toxic, uniform, urban, virus, wearing, woman, young,