CD4 and sexually transmitted disease: In contrast, the data showed evidence of a difference between strategies according to the use of PrEP (25.8% vs. 15.2% for SC and ID groups, respectively, p < 0.001), while there was no evidence for a difference in all other examined factors (i.e., sexual orientation, history of STI other than HIV, CD4 counts for those with HIV, and history of smallpox vaccination).