Ключевые слова: 2019ncov, backpack, caucasian, cold, covid, covid19, disease, distance, epidemic, face, female, fever, ffp2, filter, flu, girl, health care, illness, infection, kn95, lady, lifestyle, mask, medical, metro, n95, passenger, pneumonia, protection, public, quarantine, safety, social, subway, train, transport, transportation, virus, wearing, woman, women, young,