Ключевые слова: 1213, 1314, 1718, 1819, adolescence, adolescent, american, backpack, boy, caucasian, contemporary, coronavirus, covid19, education, epidemic, european, french, friend, friendship, german, girl, going, group of people, high school student, infection, learn, mask, moving, notebook, outside, pandemic, person, pupil, russian, school, schoolgirl, student, study, teenage, teenager boy, together, urban, walking, young, youth,