PPIB and hepatitis A virus infection: Hepatitis B vaccine should be routinely offered to all unvaccinatedpersons attending STD clinics and to all unvaccinated persons seekingevaluation or treatment for STIs in other settings, especiallycorrectional facilities, facilities providing substance misuse treatmentand prevention services, Federally Qualified Health Centers, andsettings serving MSM (e.g., HIV infection care and prevention settings).If hepatitis B vaccine is unavailable at a particular facility, personsshould be linked to a setting where they can receive vaccine.