Ключевые слова: 6, 19, african, allergy, american, back, black, boy, child, clever, coronavirus, covid, elementary, environmental, epidemic, face, ffp3, flu, global, happy, kid, mask, medical, n95, n99, pandemic, pollution, portrait, primary, prohibition, protection, protective, quarantine, respirator, safety, school, schoolboy, smart, successful, to, toxic, years,