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2019 novel coronavirus, alert, bacteria, biology, care, caution, confirmed, contagious, contamination, coronavirus, coronavirus19, covid, covid19, death, diagnosis, disease, epidemic, fever, flu, global, health, illness, immunity, infected, infection, influenza, medical, microbe, outbreak, pandemic, pathogen, pneumonia, prevention, quarantine, respiratory, risk, science, sickness, spread, stop, symptoms, vaccine, viral, virology, virus, warning, who, world,