Ключевые слова: america, american, analysis, arrow, biochemistry, blood, chemistry, city, cityscape, contagious, dangerous, decline, diagnosis, disease, doctor, down, flag, gloves, hands, hazmat, health, hold, illness, infectious, laboratory, liquid, medical, medicine, microbiology, mutation, new, omicron, outbreak, pandemic, pneumonia, positive, professional, protection, protective, research, researcher, science, specialist, text, tube, united states, vaccine, variant, virus, word,