"Due to its antiviral effects and its importance for all immunological functions, the administration of selenium is suggested as a supportive measure in early as well as in advanced stages of HIV-induced disease. Initial observations on the effects of selenium supplementation in HIV-infected patients indicate that selenium causes symptomatic improvements and possibly slows the course of the disease"
https://pubmed.ncbi.nlm.nih.gov/7514960/
"The scientists concluded that a daily supplement of selenium can “suppress the progression of HIV-1 viral burden and provide indirect improvement of CD4 count.” They suggest that these results “support the use of Selenium as a simple, inexpensive, and safe adjunct therapy in HIV spectrum disease.”"
https://www.medicalnewstoday.com/articles/61469#2
"Selenium supplements can slow the rise in virus levels in HIV-positive patients, which allows the number of beneficial CD4 immune cell to increase, according to results of a clinical trial supported by grants from the National Institutes of Health."
https://www.reuters.com/article/us-selenium-hiv-idUSTON30833720070123
Role of selenium in HIV infection
https://pubmed.ncbi.nlm.nih.gov/20961297/