Hepatitis B is a matter of concern in Việt Nam, with at least 5 per cent of the population infected. Contaminated food or water: Hepatitis A can be spread by eating or drinking food or water contaminated with the virus. Hepatitis B – Chronic Infection when acquired pre-puberty: Acute infection with resolution when acquired as adult (as a general rule). Hepatitis D – Chronic infection mainlyAlso known as "delta hepatitis". So you need to have B already to get D.No vaccine for Hepatitis D (prevented in persons who are not already HBV-infected by Hepatitis B vaccination).

Source: Viet Nam News July 24, 2017 02:15 UTC