Ключевые слова: background, bacteria, blue, color, contaminants, cubes, danger, dangerous, disease, epidemic, flat, health, hygiene, illness, infection, invisible, lay, light, listeria, made, medical, medicine, micro, microbe, microbes, microbiology, microorganism, nobody, object, organism, organisms, parasite, pills, salmonella, top, toxins, view, virus, wooden, word,