Ключевые слова: 19, background, biohazard, biology, concept, contagious, contamination, corona, danger, dangerous, disease, epidemic, fever, flu, global, health, infected, infection, infectious, medicals, medicine, microbe, microbiology, microscopic, mobile, outbreak, pandemic, pathology, phone, pneumonia, protection, quarantine, respirators, sars, science, vaccine, virology, virus, warning,