ABSTRACT
Objectives: The WHO European Region set targets for the control of hepatitis B through immunization, including prevalence of hepatitis B surface antigen (HBsAg) at ≤0.5% in vaccinated cohorts. The Republic of Moldova implemented universal hepatitis B vaccination since 1995. We conducted a nationwide representative serosurvey to estimate HBsAg seroprevalence in children born in 2013 to validate hepatitis B control targets. Methods: We used probability-based sampling and a two-stage cluster design. All children born in 2013 and registered in primary healthcare facilities were eligible for participation. We tested blood samples of all participants for hepatitis B core antibody (anti-HBc), using Enzyme-Linked Immunosorbent Assay (ELISA). Anti-HBc-positive samples were tested for HBsAg and HBsAg-positive samples confirmed, using ELISA. We obtained information on hepatitis B vaccination from vaccination cards. Results: Of 3352 sampled children, 3064 (91%) participated. Most participating children were 7 years old (n = 3030, 99%), 1426 (48%) were girls. The weighted, national seroprevalence estimate was 3.1% (95% confidence interval = 2.1-4.5) for anti-HBc and 0.21% (95% confidence interval = 0.08-0.53) for HBsAg. Conclusion: The study demonstrated the impact of hepatitis B vaccination and allowed the Republic of Moldova to validate regional hepatitis B control targets. Other countries with high vaccination coverage could use hepatitis B serosurveys and apply for validation. Sustained efforts in the Republic of Moldova will be crucial on the path to hepatitis B elimination.
ABSTRACT
BACKGROUND: In 2021, a survey was conducted as part of the regional program of the United Nations Population Fund (UNFPA) Regional Office for Eastern Europe and Central Asia (EECA) to assess the policies and practices relating to HPV vaccination and cervical cancer screening in the 17 countries and territories included in this region. Since then, very substantial progress has been made with HPV vaccination across the region so another survey was conducted establish the current situation. METHODS: A 10 question survey covering the policies, plans and practices for HPV vaccination was prepared. As cervical cancer prevention is a priority for the UNFPA, its offices in the 17 countries and territories included in this study are well placed to identify the people who can provide authoritative data for this survey. Working with the UNFPA offices, the questionnaires were sent to these national experts in May 2023, with data collected until 30 June 2023. All countries and territories returned completed questionnaires. RESULTS: In the period from 30 June 2021 to 30 June 2023, the number of countries and territories that have implemented or are implementing HPV vaccination programs has doubled. As of 30 June 2021, only 6 of 17 countries and territories had implemented national HPV vaccination programmes, and by 30 June 2023, another 6 could be added to this list. Of the 4 countries with sub-optimal vaccination coverage rates in 2021, none showed substantial improvement over the 2-year period. CONCLUSIONS: The implementation of HPV vaccination programs across the region is progressing very rapidly with ≈70% of the countries and territories implementing or having implemented national programs. However, greater attention needs to be given to ensuring that both the old and the new programs will achieve high coverage rates.
