Ключевые слова: announcement, biohazard, class, classroom, college, communication, concept, danger, dangerous, diagnosis, diagnostic, disease, education, epidemic, flu, glass, global, green, hand, health, health care, hospital, illness, infection, infectious, medical, medication, medicine, message, outbreak, page, pandemic, pneumonia, prevent, prevention, protection, quarantine, respiratory, risk, russian, school, syndrome, teacher, text, virology, virus, warning,