Ключевые слова: bacteria, bacterial, biology, blood, capsid, cell, concept, design, disease, dna, envelope, epidemiology, graphic, health, health care, hepatitis, human, icon, illness, illustration, immune, immunodeficient, infection, infectious, isolated, line, liver, medical, medicine, microbe, microbiology, microorganism, microscope, object, organism, outline, pictogram, polymerase, protection, retrovirus, science, scientific, sexually transmitted, sick, structure, viral, virology, virus, web,