Ключевые слова: 3d illustration, abstract, anatomy, background, bacteria, bacteria cell, biology, bronchial, cancer, cells, contagious, cross section, diagnosis, disease, epidemiology, flu, germ, infected, infection, infectious, internal, lobe, lung virus, lungs, medical, medicine, micro, microbe, microscopic, organ, pneumonia, pulmonary, science, sick, syndrome, virus,