Ключевые слова: academic, announce, asia, asian, blackboard, chinese, classroom, closed, college, concept, cough, covid19, disease, education, elder, empty, epidemic, flu, health, ill, infection, infectious disease, internet, lung, male, man, mature, notice, pandemic, people, pneumonia, professor, quarantine, safety, school, school closed, senior, serious, sign, sore throat, spread, study, suspended, suspension, teacher, transmissible, university, virus,