Ключевые слова: air, asian boy, back to school, bag, boy, caucasian, child, childhood, common cold, corona virus, covid 19, cute, dust, education, environment, epidemic, face mask, harmful, health, health care, healthy lifestyle, illness, infectious disease, influenza, kid, little, mask, outbreak, people, person, pollution, portrait, prevention, school, school children, sick, small, student, virus protection, white, young,