Ключевые слова: 2019, background, bacterium, care, concept, corona, coronavirus, covid, covid19, danger, disease, epidemic, equipment, face, fever, flu, global, health, human, hygienic, ill, illness, infect, infection, influenza, man, mask, medical, medicine, ncov, outbreak, pandemic, pneumonia, pollution, prevention, protection, quarantine, respiratory, safety, sars, science, sick, sickness, spread, surgical, viral, virus, warning, wear,