CD4 and infection: Treatment with 20 mg/kg probenecid, 20 mg/kg amoxicillin, the combination of 20 mg/kg probenecid and 20 mg/kg amoxicillin, and 100 mg/kg baicalin could restore the intensity of the CD3, CD4, and CD8 protein expression in the blood vessels of mice compared to the infection group (p < 0.05) (Figure 6, Supplemental Figures S4 and S5).