Ключевые слова: background, biological, colorful, condom, disease, healthcare, human, infertility, medicine, men, microbe, microorganism, microscope, microscopic, one, parasite, protist, protozoan, science, sex, sexually, transmitted, trichomonas, trichomoniasis, urethra, urethritis, vaginalis, vaginitis, veneral, view, women,