Ключевые слова: avian influenza, bacteria, bacterium, biology, bronchial, cell, cells, concept, conceptual image, contagion, contagious, contamination, diagnosis, disease, epidemic, epidemiology, fever, flu, h5n8, health, human, human infections, hygiene, immune, infected, infection, infectious, medical, medicine, micro, microbe, microbiology, microscopic, molecules, organism, outbreak, pandemic, pathogen, pulmonary, research, retrovirus, science, sick, sickness, system, vaccine, viral, virology, virus, viruses,