Targeted outreach hepatitis B vaccination program in high-risk adults: The fundamental challenge of the last mile
Keywords: کارگران جنسی بازرگانی; Hepatitis B virus vaccination; High-risk group; Men having sex with men; Commercial sex workers; Hard drug users; Cost-effectiveness; Economic evaluation; anti-HBc; hepatitis B core antigen; CSW; commercial sex workers; HBsAg; hepatitis B surface antigen;