Cambodia is one of the countries with the highest hepatitis B prevalence among the general public in the world. It was observed that the prevalence of hepatitis B in 5-year-old children decreased slightly from 2005 through 2011. This was due to the introduction of the HepB vaccine in 2001; its coverage in 2006 was also low at around 40% for HepB birthdose and 85% for pentavalent (Graph 2 and 3). In an early 2017 survey, it is expected that this prevalence might be below 1% because the birthdose coverage almost doubled in 2010 (71%) compared with 2006.