KRT88P and syphilis: In this study, we demonstrate that the prevalence of HBsAg positivity was similar between HIV-infected MSM and HIV-uninfected individuals (Group II-IV) who were born in the era of universal HBV vaccination (in or after 1986) despite the fact that HIV-infected MSM (Group II) were more likely to have syphilis and had a higher prevalence of anti-HBc positivity, while HIV-infected MSM born in 1984–1985 (Group I) had a significantly higher prevalence of HBsAg positivity than HIV-infected MSM in or after 1986 (Group II) (Table 1 and Figure 1).