Ключевые слова: alertness, asia, attention, bacteria, bacterium, biohazard symbol, caution, corona, coronavirus, cough, covid19, danger, dangerous, epidemic, europe, fever, hazard sign, health, hospital, illness, illustration, infection, infectious disease, medical, medicine, outbreak, pandemic, panic, pneumonia, prevention, protection, quarantine, red, risk, safety, science, sickness, stop, stop sign, symptom, treatment, usa, virus, warning sign, warning symbol, world, wuhan,