Least concentration of human immunodeficiency virus is seen in
Viral load of HIV is maximum in blood, genital secretions like semen, and CSF

It also found in breast milk, saliva, lymphocytes, cell-free plasma, cervical secretions, saliva, tears, & minimal in urine

Saliva can contain fibronectin & glycoproteins, which prevent transmission of the virus.
A salivary protein called secretory leucocyte protease inhibitor also has anti-HIV activity
Saliva
CSF
Blood
Semen