Ключевые слова: alert, analysis, background, bacteria, bio hazard, biochemistry, biohazard, biological, biological hazard, care, caution, concept, corona virus, coronavirus, coronavirus vaccine, covid19, danger, disease, epidemic, hazard, hazardous, health, infection, infectious, lab, laboratory, medical, medicine, pandemic, protection, restricted, risk, safety, science, scientific, scientist, security, sign, symbol, technology, vaccination, vaccine, virus, warning, yellow, zone,