Ключевые слова: 19, 2019, alert, between, boy, contagious, contamination, corona, coronavirus, cov, covid, covid 19, danger, disease, distancing, epidemic, girl, health, illness, infected, infection, infectious, man, masks, medical, men, microbiology, ncov, pandemic, pneumonia, protection, quarantine, sick, social, symptoms, virology, virus, woman, women,