Carbon footprint of antenatal diagnostic strategies to identify pregnant women eligible for hepatitis B antiviral prophylaxis in The Gambia, west Africa (Supplementary Appendix)

This file is the supplementary appendix for an original research paper published by the Bulletin of the World Health Organization (2026), titled Carbon footprint of antenatal diagnostic strategies to identify pregnant women eligible for hepatitis B antiviral prophylaxis in The Gambia, west Africa.This appendix consists of the following:Appendix 1. Data quality assessment criteriaAppendix 2. Estimation of uncertainty based on data quality indicatorsAppendix 3. Site-specific testing practices across the four study sitesAppendix 3A. HBsAg screening testAppendix 3B. Post-screening testsAppendix 4. Breakdown of carbon footprint (g CO₂e) for each hepatitis B testing strategy across four study sites, by process and activity