Ключевые слова: 2019, allergy, biology, block, blue, common, contagious, coronavirus, cough, cov, disease, east, enterovirus, flu, h1n1, health, hygiene, icon, infection, infectious, influenza, info, killer, medical, middle, ncov, new, pneumonia, prevention, question, respiratory, sars, sick, syndrome, system, text, transfer, vaccine, viral, virus, word,