Ключевые слова: 3d, 3dillustration, billboard, biohazard, blackboard, chalk, classroom, closed, college, commercial, communication, concept, contagion, copy, coronaviridae, coronavirus, course, disease, education, elementary, epidemic, flu, gym, health, illness, illustration, influenza, lesson, medical, message, ncov, novel, outbreak, pneumonia, protective, reminder, sars, sarscov2, school, schooling, study, syndrome, teacher, university, vaccine, virus,