Impact of routine hepatitis B immunization on the prevalence of chronic hepatitis B virus infection in the marshall islands and the federated States of micronesia

Timeliness in the uptake of hepatitis B birth dose among Indian children under age five: A population-based study

OBJECTIVE

To assess the timeliness and risk factors for the delay in the uptake of the hepatitis B birth dose among Indian children aged 0-59 months. Information regarding whether the children received the birth dose and the time of receiving it was recorded based on the vaccination card available at the time of the National Family Health Survey (NFHS).

METHODS

Using data from the fourth and fifth round of India's National Family Health Survey (NFHS), the percentage of uptake and timely receipt of the hepatitis B birth dose were obtained by background characteristics and at the sub-national level (state). Multinomial logistic regression analysis was used to examine the risk factors. This study further performed a negative binomial regression estimation to predict the probability of receiving the birth dose at each day within a multivariable framework.

RESULTS

It was found that approximately 34 % of the children who received the birth dose and the timing of receiving the birth dose was made available through the vaccination card were administered the dose within 24-hours during 2015-16. However, the percentage increased to 51.91 % during 2019-21. During 2019-21, Ladakh had the highest proportion (85.03 %) of children receiving the dose within 24-hours, followed by Jammu & Kashmir with 78 %, and Arunachal Pradesh with 68 %. Mother's education, economic status of the child's family and region (children belong from) were found to be significant predictors in delay of receiving the birth dose within 24 hours.

CONCLUSION

Results indicated a need for targeted interventions to improve the coverage and timeliness in the uptake of this critical vaccine dose in the country. These interventions could include strategies such as strengthening the healthcare system, improving awareness among parents and healthcare providers, addressing logistical challenges in vaccine delivery, and promoting community engagement and education on importance of timely vaccination.

Hepatitis B surface antigen prevalence and the rates of mother-to-child transmission of hepatitis B virus after the introduction of infant vaccination programs in South East Asia and Western Pacific regions: a systematic review

OBJECTIVES

Infant vaccination against the hepatitis B virus began in the World Health Organization South East Asia Region and the Western Pacific Region between 1983 and 2016. This systematic review examined the seroprevalence of hepatitis B surface antigen (HBsAg) in children and the rate of mother-to-child transmission (MTCT) in these regions between 1990 and 2020.

METHODS

MEDLINE and EMBASE were searched for articles published between January 1990 and September 2020, which reported seroprevalence of HBsAg in children aged 0-15 years and/or the rate of MTCT in the South East Asia Region and Western Pacific Region. A pragmatic review identified supporting information. This review was registered in the International Prospective Register of Systematic Reviews (#CRD42020211707).

RESULTS

Of 115 included studies, 77 (24 countries) reported HBsAg prevalence, and 38 (nine countries) reported MTCT. The seroprevalence of HBsAg ranged between 0.0% and 27.4%, with a decreasing trend over time in each country. MTCT rates were 0.0-5.2% in infants of mothers who are hepatitis B e antigen-negative and 2.7-53.0% in infants of mothers who are hepatitis B e antigen-positive.

CONCLUSION

After the introduction of infant hepatitis B virus vaccination programs, the countries in South East Asia Region and Western Pacific Region observed a reduction in HBsAg seroprevalence in children. Nevertheless, the risk of MTCT persists, emphasizing the importance of antenatal screening to identify high-risk pregnancies.

Accelerating the elimination of viral hepatitis: a Lancet Gastroenterology & Hepatology Commission

Viral hepatitis is a major public health threat and a leading cause of death worldwide. Annual mortality from viral hepatitis is similar to that of other major infectious diseases such as HIV and tuberculosis. Highly effective prevention measures and treatments have made the global elimination of viral hepatitis a realistic goal, endorsed by all WHO member states. Ambitious targets call for a global reduction in hepatitis-related mortality of 65% and a 90% reduction in new infections by 2030. This Commission draws together a wide range of expertise to appraise the current global situation and to identify priorities globally, regionally, and nationally needed to accelerate progress. We identify 20 heavily burdened countries that account for over 75% of the global burden of viral hepatitis. Key recommendations include a greater focus on national progress towards elimination with support given, if necessary, through innovative financing measures to ensure elimination programmes are fully funded by 2020. In addition to further measures to improve access to vaccination and treatment, greater attention needs to be paid to access to affordable, high-quality diagnostics if testing is to reach the levels needed to achieve elimination goals. Simplified, decentralised models of care removing requirements for specialised prescribing will be required to reach those in need, together with sustained efforts to tackle stigma and discrimination. We identify key examples of the progress that has already been made in many countries throughout the world, demonstrating that sustained and coordinated efforts can be successful in achieving the WHO elimination goals.

A Socio-Ecological Framework for Cancer Control in the Pacific: A Community Case Study of the US Affiliated Pacific Island Jurisdictions 1997-2017

The United States Affiliated Pacific Island Jurisdictions (USAPIJ) are politically associated to the United States (US) as US Territories (Guam, American Samoa), a US Commonwealth (Commonwealth of the Northern Mariana Islands), and as sovereign nations linked to the US through Compacts of Free Association [Federated States of Micronesia (FSM), Republic of the Marshall Islands (RMI), Republic of Palau (ROP)]. Cervical cancer incidence in the RMI is the highest in the world, mammography services are not available in the FSM and only Guam has on-island oncology services. Cancer risk factors such as obesity, tobacco, and Hepatitis B are prevalent. Twelve years of nuclear testing in the RMI adds to the cancer burden. A community-based, multi-national coalition with multi-system external partners the Pacific Regional Cancer Control Partnership (PRCP) was developed to address cancer prevention and control in the USAPIJ. Through the PRCP, local cancer coalitions, a regional cancer registry, 12 years of regional cancer control plans, and cancer prevention programs and research has been implemented. Methods: The PRCP is the subject of this community case study. The PRCP is analyzed through a socio-ecological theoretical framework to contextualize its typology, building blocks, and management. The respective roles and work of each partner and organization will be described and aligned with the levels of the socio-ecological framework. Results: The USAPIJs evolved a community-focused internal and external regional cancer prevention and control network over 20 years. The function and structure of the PRCP fits within a socio-ecological framework for cancer control. An adaptive management strategy has been used within the PRCP to manage its multi-national, multi-level, and multi-system partners. Conclusion: The PRCP has been able to advance cancer prevention and control programs with a community-centric model that functions in a multi-national, multi-cultural, low-resource, geographically dispersed environment over the last 20 years. The PRCP operates with a structure and management style that is consistent with a socio-ecological framework for cancer control. This case study provides a blueprint for the PRCP organizational structure and a mechanism for its function. The PRCP concept, a community-centric model for cancer control in multi-national resource-limited environments, may be scaled to other global environments.

Using CBPR to address health disparities with the Marshallese community in Arkansas

CONTEXT

Arkansas currently has the largest Marshallese community in the continental US. The limited research available demonstrates that Marshallese have significant health disparities, with higher rates of obesity, diabetes, cardiovascular disease and infectious diseases than the US population.

OBJECTIVES

The purpose of this paper is 2-fold: (1) to describe the formation and capacity building efforts of a community-based participatory research partnership with the Marshallese community in Arkansas and (2) to describe key findings and lessons learned from 5 years of collaborative research.

METHODS

A community-based participatory research approach was implemented to build alliances and improve health disparities in a Marshallese community.

RESULTS

Overarching lessons learned from collaboration with the Marshallese community include the: (1) Intensive involvement of Marshallese from multiple sectors of the community and in multiple roles in the research process, (2) Importance of interprofessional teams, (3) Importance of church, (4) Consideration of sex, (5) Importance of family and definition of family, (6) Talk Story and qualitative methods and the (7) Importance of cultural humility.

CONCLUSIONS

This research helps fill important gaps in documenting the health disparities and interventions to address those disparities in the Marshallese community.

Low Level of Hepatitis B Virus Infection in Children 20 Years After Initiation of Infant Vaccination Program in Wallis and Futuna

The prevalence of hepatitis B virus (HBV) in Wallis and Futuna (WAF) was one of the highest in the Pacific and was the driving factor for introducing hepatitis B (HepB) vaccination in 1992 and HepB birth dose (HepB-BD) in 2006. Using lymphatic filariasis (LF) transmission assessment survey (TAS) as a survey platform for eliminating LF, we assessed HBV surface antigen (HBsAg) seroprevalence, HepB vaccination coverage, and its timeliness among schoolchildren in WAF. From one finger prick of all registered fourth and fifth grade students, we tested HBsAg and filariasis antigen simultaneously, and estimated HepB vaccination coverage and timeliness by reviewing students' immunization cards. Since the children targeted were born when the three-dose HepB schedule was 2, 3, and 8 months, we defined timely vaccination if each dose was given by 3, 4, and 12 months. Of 476 targeted, 427 were enrolled. HBsAg prevalence was 0.9%. Estimated HepB vaccination coverage was 97%, 97%, and 96% for the first, second, and third doses, respectively, yielding coverage for all three doses of 96%. Proportion of timely vaccination was lower: 80%, 56%, and 65%, respectively, and less than 50% for all three doses combined. The seroprevalence of HBsAg among schoolchildren in WAF is less than 1%, close to the control goal. HepB vaccination coverage was high, but many children were vaccinated late. We recommend increasing the efforts for timely HepB vaccination. By combining an HBV seroprevalence survey and coverage assessment, we demonstrated the benefit of using TAS as a public health platform to access schoolchildren.

Impact of universal infant hepatitis B vaccination in the US-affiliated Pacific Islands, 1985-2015

The US-affiliated Pacific Island countries (USAPI) is an endemic region for hepatitis B virus (HBV) infection. Universal infant hepatitis B vaccination was introduced in the USAPI in the mid-1980s to mitigate the HBV burden. We assessed the impact of universal infant vaccination on the HBV infection prevalence over time among children born in the 1980s, 1990s, and 2000s in the USAPI. Demographic and serologic data from serial sero-surveys conducted between 1985 and 2015 were obtained. Descriptive statistics and analysis of variance were performed. From data obtained from 4827 children (2-11years), HBV prevalence decreased markedly: 8.4% in the 1980s; 2.5% in the 1990s; and 0.2% in the 2000s (P<0.0001) as vaccination coverage increased: 76.4% in the 1980s; 87.3% in the 1990s; and 97.5% in the 2000s (P<0.0001). These findings underscore the protective effect of universal infant hepatitis B vaccination over time on the HBV burden in an HBV endemic region.

Breast-feeding perceptions, beliefs and experiences of Marshallese migrants: an exploratory study

OBJECTIVE

To determine perceptions, beliefs and experiences affecting breast-feeding in Marshallese mothers residing in Northwest Arkansas, USA.

DESIGN

A qualitative, exploratory study using a brief survey and focus groups. Marshallese women, 18 years or older who had a child under 7 years of age, were included in the study.

SETTING

Community-based organization in Northwest Arkansas.

RESULTS

The majority of mothers viewed breast milk as superior to formula, but had concerns about adequate milk supply and the nutritional value of their milk. The primary barriers to exclusive breast-feeding in the USA included public shaming (both verbal and non-verbal), perceived milk production and quality, and maternal employment. These barriers are not reported in the Marshall Islands and are encountered only after moving to the USA. Breast-feeding mothers rely heavily on familial support, especially the eldest female, who may not reside in the USA. The influence of institutions, including the Special Supplemental Nutrition Program for Women, Infants, and Children, is strong and may negatively affect breast-feeding.

CONCLUSIONS

Despite the belief that breast milk is the healthiest option, breast-feeding among Marshallese mothers is challenged by numerous barriers they encounter as they assimilate to US cultural norms. The barriers and challenges, along with the strong desire to assimilate to US culture, impact Marshallese mothers' perceptions, beliefs and experiences with breast-feeding.

Progress towards hepatitis B prevention through vaccination in the Western Pacific, 1990-2014

Hepatitis B infections are responsible for more than 300 thousand deaths per year in the Western Pacific Region. Because of this high burden, the countries and areas of the Region established a goal of reducing hepatitis B chronic infection prevalence among children to less than 1% by 2017. This study was conducted to measure the progress in hepatitis B prevention and assess the status of achievement of the 2017 Regional hepatitis B control goal. A literature review was conducted to identify studies of hepatitis B prevalence in the countries and areas of the region, both before and after vaccine introduction. A mathematical model was applied to assess infections and deaths prevented by hepatitis B vaccination and hepatitis B prevalence in countries without recent empirical data. The majority of countries and areas (22 out of 36) were estimated to have over 8% prevalence of chronic hepatitis B infection among persons born before vaccine introduction. After introduction of hepatitis B vaccine, most countries and areas (24 out of 36) had chronic infection prevalence of less than 1% among children born after vaccine introduction. It was estimated that in the past 25 years immunization programmes in the Western Pacific Region have averted 7,167,128 deaths that would have occurred in the lifetime of children born between 1990 and 2014 if hepatitis B vaccination programmes had not been established. Regional prevalence among children born in 2012 was estimated to be 0.93%, meaning that the Regional hepatitis B control goal was achieved. While additional efforts are needed to further reduce hepatitis B transmission in the region, this study demonstrates the great success of the hepatitis B vaccination efforts in the Western Pacific Region.

Health Beliefs of Marshallese Regarding Type 2 Diabetes

OBJECTIVES

The Marshallese population suffers from disproportionate rates of type 2 diabetes. This study identifies the underlying beliefs and perceptions that affect diabetes self-management behavior in the US Marshallese population living in Arkansas.

METHODS

The study employs focus groups with a semi-structured interview guide developed using a community-based participatory research (CBPR) approach and the Health Belief Model. Data were collected from 41 participants; bilingual community co-investigators provided translation as needed.

RESULTS

The results show high-perceived threat, with most participants describing diabetes as inevitable and a death sentence. Participants are generally unaware of the benefits of diabetes self-management behaviors, and the Marshallese population faces significant policy, environmental, and systems barriers to diabetes self-management. The primary cue to action is a diagnosis of diabetes, and there are varying levels of self-efficacy.

CONCLUSIONS

The research grounded in the Health Belief Model provides important contributions that can help advance diabetes self-management efforts within Pacific Islander communities.

Hepatitis B virus infection in children

For two decades, hepatitis B vaccine has been integrated into national routine childhood vaccination programs in almost all countries. The prevalence of HBsAg has decreased in children worldwide. However, there are children who miss the benefit of hepatitis B vaccine in some regions and countries. Long-term follow-up studies have revealed the clinical outcomes of chronic hepatitis B virus infection in children. A small percentage of chronically infected children develop liver cirrhosis and hepatocellular carcinoma. However, it is controversial who should be treated and when antiviral treatment should be initiated in children. Compared with adult studies, the data are insufficient to evaluate the pathogenesis of hepatitis B infection and the efficacy of antiviral treatment in childhood. New antiviral drugs have been approved for children and adults. Also, oral antiviral drugs are administered to pregnant women to reduce the hepatitis B virus mother-to-child transmission rate.

Barriers and opportunities: a community-based participatory research study of health beliefs related to diabetes in a US Marshallese community

PURPOSE

This study investigates the beliefs and perceptions related to type 2 diabetes that influence diabetes self-management behaviors for Marshallese in the United States. Using the health belief model as a theoretical framework, the researchers seek to better understand the underlying beliefs that motivate or impede diabetes self-management behaviors.

METHODS

The community-based participatory research (CBPR) collaborative engaged in 14 months of preliminary fieldwork and conducted 2 tiers of focus groups for this project as part of the long-term commitment to reducing health inequalities in the Marshallese community. The CBPR team conducted an initial round of 2 exploratory focus groups (n = 15). Based on the knowledge gained, researchers held a second round of focus groups (n = 13) on health beliefs regarding diabetes. All participants were Marshallese, aged 18 years and older, and included men and women. Participants either had a diagnosis of diabetes or were a caretaker of someone with diabetes.

RESULTS

The findings elucidate the structural and nonstructural barriers to successful diabetes self-management for Marshallese in the United States. Barriers include eating differently from the rest of the family, social stigma of diabetes, transportation, cost, lack of access to health care, and cultural and language barriers.

CONCLUSIONS

While there are significant barriers to improving diabetes self-management, there are also areas of opportunity, including family and peer reinforcement to encourage proper diabetes management behaviors and a growing community desire to lift the stigma of diabetes. The CBPR team offers recommendations to make diabetes management interventions more culturally appropriate and effective for the Marshallese population.

Overview of hepatitis B prevalence, prevention, and management in the Pacific Islands and Territories

There are over 500-750 000 deaths per year because of hepatitis B virus (HBV)-related cirrhosis and liver cancer worldwide and the World Health Organization Western Pacific Region has some of the highest endemic levels of HBV in the world, particularly within China, South East Asia and Pacific Island Countries and Territories (PICT). The PICT have unique ethnic diversity and a very high prevalence of smoking and metabolic syndrome, both important risk factors for liver fibrosis and liver cancer. However, in contrast to many Asian countries, there is little published data on HBV prevalence and related liver disease burden in PICT. In this review, the available published literature and World Health Organization data for HBV prevalence and related liver disease and liver cancer burden in PICT is outlined, and unmet needs for improving HBV prevention and control in the region are highlighted.

Lower than expected hepatitis B virus infection prevalence among first generation Koreans in the U.S.: results of HBV screening in the Southern California Inland Empire

Background

Hepatitis B virus (HBV) infection is prevalent in Asian immigrants in the USA. California’s Inland Empire region has a population of approximately four million, including an estimated 19,000 first generation Koreans. Our aim was to screen these adult individuals to establish HBV serological diagnoses, educate, and establish linkage to care.

Methods

A community-based program was conducted in Korean churches from 11/2009 to 2/2010. Subjects were asked to complete a HBV background related questionnaire, provided with HBV education, and tested for serum HBsAg, HBsAb and HBcAb. HBsAg positive subjects were tested for HBV quantitative DNA, HBeAg and HBeAb, counseled and directed to healthcare providers. Subjects unexposed to HBV were invited to attend a HBV vaccination clinic.

Results

A total of 973 first generation Koreans were screened, aged 52.3y (18-93y), M/F: 384/589. Most (75%) had a higher than high school education and were from Seoul (62.2%). By questionnaire, 24.7% stated they had been vaccinated against HBV. The serological diagnoses were: HBV infected (3.0%), immune due to natural infection (35.7%), susceptible (20.1%), immune due to vaccination (40.3%), and other (0.9%). Men had a higher infection prevalence (4.9% vs. 1.7%, p = 0.004) and a lower vaccination rate (34.6% vs. 44.0%, p = 0.004) compared to women. Self-reports of immunization status were incorrect for 35.1% of subjects.

Conclusions

This large screening study in first generation Koreans in Southern California demonstrates: 1) a lower than expected HBV prevalence (3%), 2) a continued need for vaccination, and 3) a need for screening despite a reported history of vaccination.

Hepatitis B virus carrier rate, prevalence and susceptibility and impact of immunization program among households in the city of Taiz, Yemen

OBJECTIVE

To examine the carrier rate, prevalence and susceptibility to hepatitis B virus infection in the city of Taiz, Yemen.

METHODS

In a community-based household survey 521 subjects from 98 randomly selected households were enrolled. Carrier rate, prevalence and susceptibility of hepatitis B virus infection in the city of Taiz, Yemen were examined.

RESULTS

The median age of the subjects was 19 years (range <1-85 years), 219 (42.0%) of whom were males and 305 (58.0%) were females. The HBsAg carrier rate was 4.2% (22/521), the prevalence was 16.9% (88/521) and the susceptibility rate was 57.5% (287/499). Male vs female carrier rate, prevalence and susceptibility rate were comparable. Children (age ≤ 18 years) vs adults had carrier rates of 2.7% vs 5.7% (odds ratio=2.2) and a prevalence of 5.1% vs 28.4% (OR: 5.6). The carrier rate, prevalence and immunity to HBV among subjects who reported vaccination vs those unvaccinated was; 2.1% vs 5.5%, 11.3 vs 20.8% and 53.1% vs 18.8%. A proportion of 47.2% of subjects who aged ≤ 10 years had isolated anti-HBs. Of 142 of the cohort born after full implementation of vaccination program (age:≤ 9 years) 72 (50.7%) were immune and 70 (49.3%) were susceptible whereas of 357 subjects borne before program implementation (Age:≥ 10 years) 140 (39.2%) were immune and 217 (60.8%) were susceptible (p<0.02 (Pearson) OR: 1.6 CI=0.42-0.93).

CONCLUSIONS

An intermediate endimicity was identified in Taiz city. Vaccination reduced carrier rate prevalence and susceptibility among vaccinated subjects. The high rate of subjects with isolated anti- HBs together with the reduced susceptibility rate among the cohort born after inclusion of HBV vaccine to EPI reflects impact of the program. Improving vaccination coverage will further reduce susceptibility rate.

Factors influencing administration of hepatitis B vaccine to community-dwelling teenagers aged 12-18 with an intellectual disability

The study aims to determine hepatitis B vaccination coverage rates among community-dwelling teenagers with an intellectual disability in Taiwan and to identify the possible influencing factors of their vaccination. The present paper was part of the results of the "2007 National Survey on Healthy Behaviors and Preventive Health Utilizations of People with Intellectual Disabilities in Taiwan," which was a cross-sectional survey of 1111 intellectually disabled (ID) teenagers ranging from 12 to 18 years of age. The results showed that the completed hepatitis B vaccination rate was 72.9%, a rate lower than that in the general population of Taiwan considering the same age group. There was no gender difference between each age group in the vaccination rate in this population. Multilevel logistic regression analyses revealed that those ID individuals whose primary caregivers were parents or siblings (OR = 2.45, 95% CI = 1.29-4.64), whose household monthly income was 20,000-59,999 NTD vs. less than 20,000 NTD (OR = 2.47, 95% CI = 1.00-6.12), and who had ever undergone an oral health exam (OR = 2.29, 95% CI = 1.24-4.01) were more likely to receive a complete hepatitis B vaccination than their counterparts. The study highlighted that most teenagers had received complete hepatitis B vaccination. Nonetheless, better public health strategies may be needed to deliver the hepatitis B vaccine to those who do not comply with the vaccination schedule in the community.

The use of immunization registry-based data in vaccine effectiveness studies

Vaccine effectiveness (VE) studies provide a measure of population-based vaccine performance by combining immunization history data with rates of disease incidence. This review assessed the feasibility of using electronic immunization registry data sources in VE studies. Electronic databases were searched through January 31, 2010. Out of 17 studies, only one paper assessed data accuracy (71%), and three papers assessed population coverage of the registry (estimates ranged from 25% to 90%). This review shows that registry-based data sources can be used to conduct VE studies in a variety of settings and populations. However, we found little information regarding the quality of this data source in VE studies and future evaluations should investigate their reliability, accuracy, and potential bias.