Hepatitis B (HBV) infection accounts for about 5-20% of the 36 million people living with HIV worldwide. Meanwhile, hepatitis C (HCV) co-infection with HIV accounts for 5-15%, but the rate of hepatitis C co-infection is up to 90% for injecting drug users. Co-infection with viral hepatitis increases mortality and morbidity in HIV patients, including those on antiretroviral therapy.