Ключевые слова: adult, backpacks, blur, boys, caucasian, check, children, classmates, corridor, education, elementary age, examination, friends, friendship, girls, hall, health, healthcare, indoors, infrared, job, kids, medical masks, medicine, noncontact, pandemic, people, professional, protective, pupils, quarantine, school, schoolboys, schoolchildren, schoolgirls, schoolkids, self isolation, teacher, temperature, thermometer, together, use, virus, work, workplace,