Assessing Immunity to Hepatitis A and Hepatitis B Among Individuals in Custody Living With HIV.

Screening upon entry into prison for hepatitis A virus (HAV) and hepatitis B virus (HBV) provides an ideal public health opportunity to offer vaccination to individuals who are nonimmune. We conducted a retrospective review of HAV and HBV immunity among adults living with HIV in the Illinois Department of Corrections between January 1, 2019, and December 31, 2019. The primary objective was to assess rates of HAV and/or HBV immunity in individuals with HIV. In total, 436 people were included in the study. Of 425 patients who had data for HAV vaccination, 335 were immune. Of 421 patients who had data for HBV vaccination, 272 were immune. Of the 149 patients who were nonimmune to HBV, 22 had active HBV and 6 had an equivocal HBV surface antibody and negative HBV surface antigen. In total, 212 (52%) were immune to both HAV and HBV, and 31 (8%) had no immunity to either HAV or HBV. These data demonstrate an important opportunity to discuss and provide vaccination while in custody.