Between 1986–1995, the Cook Islands, Kiribati, Niue, and Tokelau introduced hepatitis B vaccine.
National school-based serosurveys were conducted to assess hepatitis B surface antigen burden.
3.3% of Kiribati grade 1 students had chronic hepatitis B, in line with lower vaccination rates.
In the 3 other countries, no students had chronic hepatitis B, in line with high vaccination rates.