Ключевые слова: 19, 2019ncov, 2020, air, american, bacteria, city, corona, coronavirus, covid19, dangerous, disease, environmental, epidemic, european, face, face mask, flu, hazardous, health, health care, human, ill, illness, infection, influenza, man, mask, medical, medicine, person, pneumonia, portrait, protection, quarantine, respiratory, sick, street, virus, young,