Ключевые слова: bacterium, biology, biotechnology, blood, care, chemistry, clinical, concept, disease, doctor, drug, epidemic, experiment, hand, health, horizontal, hospital, human, hygiene, illness, illustration, infection, injecting, lab, laboratory, medical, medicine, microbiology, microscopic, one person, outbreak, people, protection, quarantine, research, risk, science, scientific, scientist, spread, study, technician, test, treatment, vaccination, vaccine, virus,