Ключевые слова: bacterium, biochemistry, biology, care, careful, caution, clinic, clinical, danger, dangerous, diagnosis, diagnostic, disease, emergency, fear, fever, flu, hazard, health, health care, healthcare, hygiene, illness, illustration, infection, influenza, information, laboratory, mask, medical, medicare, medicine, microbiology, pathology, pharmaceutical, prevention, protect, protection, respiratory, risk, safety, science, scientific, scientist, sickness, syndrome, treatment, vaccine,