Ключевые слова: 19, background, bacteria, biohazard, care, concept, contagion, danger, disease, epidemic, flu, global, hazard, health, infection, information, male, man, medical, medicine, omicron, outbreak, pandemic, people, pneumonia, protection, protest, protesters, quarantine, respiratory, secure, sign, spread, stop, syndrome, text, vaccine, variant, virus, virus strain,