I would say that MOST will not develop these complications. Information on Hepatitis B infection rates in Asian countries Specific information on rates of infection of infants and children from Asian countries is not easy to find because rates are dependent on local conditions and variable from place to place. Many more people have been infected and have recovered. Korea has statistics similar to the Taiwan numbers. China is trying to implement universal immunization at birth.
Higher rates occur with older children.
In most cases, adoption medical professionals ignore vaccine and testing reports from Asia, except those from Korea. Korea has newborn vaccination and testing is reliable. In China, many children are tested for the presence of HBsAg prior to being referred, but at ages typically too young to detect most infection. In Vietnam, policies on testing of children for hepatitis B vary among agencies and orphanages. Also, many labs are unreliable.