Microbiology Salivary protein, which prevents transmission of human immunodeficiency virus via saliva is: A Sialoperoxidase B Secretory IgA C Salivary leukocyte proteinase inhibitor D Histidine rich proteins 💡 Explanation Salivary protein, which prevents transmission of human immunodeficiency virus via saliva is: ✓ Correct Answer: C. Salivary leukocyte proteinase inhibitor