Ключевые слова: africa, african, black, building, checking, child, class, classroom, coronavirus, covid, covid19, door, education, entrance, face, girl, green, high school, infrared, kid, lab coat, man, mask, masks, measure, nigeria, nigerian, outside, people, person, ppe, prevent, prevention, primary school, protect, protection, protocol, pupil, resumption, safe, school, standing, student, taking, teacher, temperature, thermometer, using, wear, young,