Ключевые слова: background, bacteria, care, concept, contagion, contamination, corona, coronavirus, covid19, danger, disease, doctor, earth, environment, epidemic, equipment, face mask, flu, flu virus, global, globe, health, human, illness, infect, infected, infection, infectious, infectious disease, influenza, isolated, italy, map, medical, medical mask, medicine, microbiology, outbreak, pandemic, person, planet, pneumonia, pollution, quarantine, respiratory, science, virus, world,