1. World Health Organization. 2022. Hepatitis B Key Facts. https://www.who.int/news-room/fact-sheets/detail/hepatitis-b
2. Census of Population and Housing (POPCEN 2015). 2015. https://psa.gov.ph/content/philippine-population-surpassed-100-million-mark-results-2015-census-population. Accessed December 19, 2017.
3. Barnett, E. 2017. Give first dose of HepB vaccine within 24 hours of birth: American Academy of Pediatrics. https://publications.aap.org/aapnews/news/10295?autologincheck=redirecte
4. Centers for Disease Control and Prevention. Hepatitis B Vaccination of Infants, Children, and Adolescents. https://www.cdc.gov/hepatitis/hbv/vaccchildren.htm
5. World Health Organization. 2019. Hepatitis data and statistics in the Western Pacific. https://www.who.int/westernpacific/health-topics/hepatitis/regional-hepatitis-data