What is the percentage of perinatal transfer of hepatitis b virus in the vaccine era?

Where?: With use of the vaccine there is marked reduction in the incidence of chronic hep b carriage which is generally how perinatal transfer occurs. In taiwan, for example, the rate has fallen dramatically. In third world countries it remains inordinately high since access to the vaccine or acceptability by the population is reduced. Check the who web site for exact percentages by country.