Ключевые слова: 2020, america, background, biohazard, care, clinical, concept, danger, disease, doctors, epidemic, experimental, flag, flu, health, health care, illness, infected, infection, lab, laboratory, laboratory assistants, medical, medicine, ncov, no face, pandemic, positive, protection, research, sample, sars, science, scientist, test, test tubes, threat, treatment, tube, us, usa, viral, virus,