Prevalence of hepatitis D virus among HBsAg-positive individuals, 2015-2016: Azar cohort study.

Hepatitis D virus (HDV) is a defective RNA pathogen that requires the presence of the hepatitis B virus (HBV) for infection. Middle East countries are endemic areas for HDV infection. So, it is important to estimate the prevalence of HDV in these countries.

Seroepidemiology and risk factors of hepatitis C virus infection in East Azerbaijan, Iran: a population-based Azar Cohort study.

Background: Hepatitis C virus (HCV) is a blood-borne virus. It is a major global public health problem and can cause both acute and chronic hepatitis. The aim of this study was to report the epidemiological features of HCV infection and risk factors based on the data from Azar Cohort, East Azerbaijan province, Iran.