Hepatitis B is a major public health problem in the Philippines. An estimated 7.3 million adult Filipinos (16.7% of the adult population) are chronically infected with the hepatitis B virus (HBV) making our country hyperenedemic for hepatitis B. This rate is extremely high in comparison to other countries and is more than double the 8% average prevalence of HBV infection in the Western Pacific region. A 2003 survey showed the prevalence of hepatitis B to be highest in the 20-49 year age group, which comprise the workforce or those entering the workforce.