BMJ Global Health最新文献

The Sahel region is a geographical belt in Africa that stretches from the Atlantic Ocean to the Red Sea, between the Sahara Desert in the north and the Savannah in the south. It is characterised by challenging environmental crises and conflicts. This analysis highlights the potential implications of conflict on vaccination across five Sahel countries, including Burkina Faso, Chad, Mali, Niger and Sudan, from 2019 to 2023. It also presents recommendations to improve vaccination coverage in these settings. The WHO Immunisation Data Portal was used to extract data about vaccination coverage and disease outbreaks. With the increasing complexity of humanitarian access in the Sahel, there has been an accumulation of the number of zero-dose and underimmunised children. In 2023 alone, most of these countries had a significant proportion of zero-dose children, particularly Sudan (43%), Mali (22%) and Chad (16%). Nearly half of children in Sudan (49%), 33% in Chad and 23% in Mali are underimmunised. Measles vaccine coverage was consistently below 90% in these countries, except for Burkina Faso. The trend of polio outbreaks (circulating vaccine-derived poliovirus) across these countries showed fluctuations in the number of cases, with Niger having reported several cases over this period, and Chad having 101 cases reported in 2020 alone. Despite relatively high coverage, there were significant outbreaks of polio in Burkina Faso, Sudan and Mali in 2020, which reflects the potential impact of the COVID-19 pandemic. Lessons can be learnt from past diplomatic and programmatic successes, while investments in innovative and flexible approaches may help increase the reach of vaccination programmes in inaccessible areas.

Introduction: Faced with a backdrop of an increasing chronic disease burden from an ageing global population compounded with rising healthcare costs, health systems are required to implement cost-effective, safe and equitable care through efficient service delivery models. One approach to achieving this is through Starfield's 4Cs of primary healthcare (PHC), which delineates the key attributes of a high-performing PHC system that upholds the pillars of care coordination, first contact of care, continuity of care and comprehensive care. Therefore, this study aims to explore and elucidate the key themes and subthemes related to and extending beyond Starfield's 4Cs of PHC by integrating findings from a comprehensive literature review and a qualitative study.

Methods: In this case study analysis, case studies of PHC systems from 19 countries were purposefully selected to represent a range of income levels and diversity in health systems and PHC landscapes. A review of existing literature of peer-reviewed articles, policy documents and technical reports made publicly available data on PHC was complemented with data obtained from 61 in-depth interviews with health systems experts from a larger study. The research team thematically analysed the data and organised the key themes and subthemes into a conceptual framework that is anchored on Starfield's 4Cs of PHC.

Results: Broadly, we developed a conceptual framework with the 4Cs, placing providers and patients at the centre. The key subthemes that manifested from Starfield's 4Cs included maximising the use of existing fiscal resources, leveraging technology, improving accessibility to health services and task sharing. Other relevant and overarching themes were the deployment of national frameworks, equity, healthcare provider retention, service integration, emergency preparedness and community engagement.

Discussion: The subthemes derived point health systems in the right direction based on the trialled and tested PHC models of various countries. Their strong points were highlighted in our case studies to depict how Starfield's 4Cs are leveraged to strengthen PHC, and the themes we identified that went beyond the 4Cs are necessary considerations for modifying PHC policies going forward.

Conclusion: As the world enters an era of ageing populations and acute system shocks, PHC needs to be fortified and integrated into the more extensive system to protect the health of the population and safeguard the well-being of providers. Our conceptual framework offers health systems a glimpse of how this can be achieved.

The poor management of public health risks associated with travel by most countries proved among the most contentious issue areas during the COVID-19 pandemic. Evidence from previous outbreaks suggested travel restrictions were largely unnecessary and counterproductive to timely reporting. This led to initial WHO recommendations against the use of travel restrictions. Substantial evidence of the role of human travel in spreading SARS-CoV-2 worldwide throughout the evolving pandemic supported new thinking about the use of different types of travel measures (ie, screening, restrictions, quarantine, immunity documentation) to limit the introduction of SARS-CoV-2 into jurisdictions with low incidence and onward transmission. However, governments failed to work together, undermining public health goals. In addition, profound secondary impacts were caused by uncoordinated, frequently changing and poorly evidenced use of travel measures. Alongside the need to better understand what, when and how travel measures should be used during public health emergencies of international concern, improved global governance is required. Recently adopted revisions to the International Health Regulations (IHR), notably Article 43, failed to change current rules and commitments. Travel measures are also not being addressed in the negotiation of a pandemic agreement. Evolving evidence from COVID-19 supports a risk-based approach but global consensus on a standardised methodology remains needed. Setting aside further IHR revision, this methodology and guidelines could be advanced through a WHO technical working group. A risk-based decision instrument that incorporates pathogen and jurisdictional characteristics, and public health and social, political and economic risk analysis could then be developed as a new IHR annex.

Introduction: National malaria programmes must weigh the relative benefits of different vector control and elimination tools to prioritise resource allocation with the greatest impact. This study assesses the epidemiological and entomological impacts of piperonyl butoxide insecticide-treated nets (PBO ITN-only arm) compared with the combination of two annual non-pyrethroid indoor residual spraying (IRS) campaigns and standard pyrethroid ITNs (IRS+Standard Pyrethroid ITN arm) in the Amhara region of Ethiopia.

Methods: An open-label, stratified block-cluster randomised trial was designed to compare the impacts of the two intervention arms. ITN distribution took place from June to July 2021. IRS campaigns took place from June to July 2021 and again in June 2022. Confirmed malaria cases reported during the high transmission season (September to December) were compared in the 2 years before (2019 and 2020) vs the 2 years after (2021 and 2022) the 2021 campaigns. The difference in An. gambiae s.l. vector density per trap and indoor resting density (IRD) was assessed between the two arms during the high transmission seasons 2 years after the 2021 campaigns.

Results: Estimated malaria cases decreased significantly by 53.6% in the postintervention period compared with preintervention in the IRS+Standard Pyrethroid ITN arm (95% CI -72.9%, -29.8%) and by 55.9% in the PBO ITN arm (95% CI -73.0%, -32.5%), with no significant difference between these two arms (95% CI -30.9%, 24.0%). From the first to the second season postintervention, cases decreased non-significantly in the IRS+Standard Pyrethroid ITN arm (incidence rate ratio (IRR) 0.94; 95% CI 0.66, 1.47) but increased significantly in the PBO ITN arm (IRR 1.98; 95% CI 1.49, 2.67). Postintervention vector density and IRD were not found to be significantly different between intervention arms in either 2021 (vector density: IRR 0.78; 95% CI 0.47, 1.31; IRD: IRR 0.80; 95% CI 0.37, 1.75) or 2022 (vector density: IRR 1.27; 95% CI 0.75, 2.12; IRD: IRR 1.02; 95% CI 0.45, 2.28).

Conclusion: These findings suggest a positive impact of non-pyrethroid IRS deployed annually alongside standard pyrethroid ITNs in a setting of confirmed pyrethroid resistance. While an overall positive impact of PBO ITNs was detected, a waning impact of the nets 2 years postdistribution was observed.

Study objective: Stillbirth is burdensome in low-income and middle-income countries (LMICs), especially in sub-Saharan Africa and South Asia. Currently, there are two core outcome sets (COS) for stillbirth (prevention and bereavement care), but these were developed with limited reflection of the needs of parents in an LMIC setting. To address this gap, the objective of this study was to establish consensus on the most important outcomes for stillbirth prevention and bereavement care following stillbirth in sub-Saharan Africa and South Asia.

Methods: Previous stillbirth outcomes were reviewed for inclusion into the COS by senior research leaders and community engagement and involvement members from six sub-Saharan African and two South Asian countries. An online real-time Delphi survey was then conducted with healthcare professionals, parents who have experienced a stillbirth and researchers in the field to score the agreed list. The results of the Delphi were summarised and then discussed at a virtual consensus meeting where the final COS were agreed.

Results: 287 participants contributed towards the Delphi (143 midwives, 32 obstetricians, 50 mothers, 12 fathers and 50 researchers), with at least 2 parents attending the full consensus meetings. Consensus was reached on 13 core outcomes for stillbirth prevention covering 5 domains: obstetric, fetal, perinatal and neonatal outcomes and maternal complications. For bereavement care following a stillbirth, five core outcomes reached a consensus, which included outcomes related to labour and birth, a postpartum complication, care experience, mental health and emotional and social well-being.

Discussion: These COS will improve the consistency of outcomes for future research in an LMIC setting. Additionally, they will complement existing COS for stillbirth prevention and bereavement care developed in high-income settings. The output from this work will move us towards a global set of outcomes that can be used in stillbirth research worldwide.

Introduction: Population ageing in Africa is increasing healthcare demands. Hip fractures require multidisciplinary care and are considered an indicator condition for age-related health services. We aimed to estimate current hip fracture incidence in Zimbabwe, compare rates against other regional estimates and estimate future fracture numbers.

Methods: All hip fracture cases in adults aged ≥40 years, presenting to any hospital in Harare over 2 years, were identified. From this, age- and sex-specific hip fracture incidence rates per 100 000 person-years were estimated using 2022 Zimbabwean Census data and compared with South African and Botswanan estimates. Furthermore, using the United Nations population projections, future hip fracture numbers were estimated to 2052 for Zimbabwe.

Results: In 2022, 1 83 312 women and 1 79 212 men aged ≥40 years were living in Harare (14.9% of the city's population). Over 2 years 243 hip fracture cases, 133 (54.7%) female, mean (SD) age 71.2 (15.9) years, were identified. Most presented to public hospitals (202 [83.1%]) and were fragility hip fractures (211 [86.8%]); high-impact trauma (eg, traffic accidents) was more common in younger men. Presentation delays of >2 weeks were common (37.4%). Incidence rates for adults aged ≥40 years in Harare (observed) and Zimbabwe (estimated) were 33.5 and 53.8/100 000 person-years, respectively. Over age 50, rates increased with age, with the highest rates seen in women aged ≥85 years (704/100 000 person-years). Age-standardised hip fracture incidence rates are broadly comparable between Zimbabwe, Botswana and Black South Africans in those aged 40-69 years; thereafter, rates in Zimbabwean women and men exceed those in Botswana and South Africa. Across Zimbabwe, the number of hip fractures occurring annually is expected to increase more than 2.5-fold from 1709 in 2022 to 4414 by 2052.

Conclusion: In Zimbabwe, most hip fractures in adults ≥50 years are fragility fractures, consistent with age-associated osteoporosis; incidence rates exceed those previously reported regionally. Demands on already challenged healthcare systems will increase.

Despite progress in healthcare services for individuals living with sickle cell disease (SCD) in Africa, substantial gaps remain in advanced treatments for SCD. To help address this burden, Tanzania has established one of the largest single-centre SCD programmes in the world and developed an advanced therapy programme for SCD focused on patient engagement and advocacy, clinical activities involving exchange blood transfusion (ExBT) and haematopoietic stem cell transplant (HSCT), gene therapy (GT) preparedness, and enabling partnerships. This report describes the programme's genesis, structure and progress achieved. Patient engagement camps and patient-focused workshops conducted since early 2021 have involved more than 150 patients, family caregivers and healthcare providers. A patient registry was established by screening 1500 patients eligible for advanced therapies with 157 identified to benefit from advanced treatments for SCD. Out of which 22 patients received ExBT, and human leucocyte antigen typing was conducted on 127 individuals to establish a registry of family members with potential to be HSCT donors. Target product profiles were devised for minimum and optimum criteria of GT products to guide drug discovery and development efforts, and qualitative research was conducted to investigate factors anticipated to influence successful adoption of GTs for SCD in Africa. The programme's multifaceted components have been enabled by institutional networks and collaborations established at national, regional and global levels. The programme presented opportunities to deliver cost-effective advanced treatment and curative options for SCD in Tanzania and lessons learnt may be applicable to inform similar efforts in other African regions where SCD is highly endemic.

Introduction: Climate change is shaping adolescent and young people's (AYP) transitions to adulthood with significant and often compounding effects on their physical and mental health. The climate crisis is an intergenerational inequity, with the current generation of young people exposed to more climate events over their lifetime than any previous one. Despite this injustice, research and policy to date lacks AYP's perspectives and active engagement.

Methods: Participatory, youth co-led qualitative focus group discussions were held in Bangladesh, Guatemala and Nigeria in mid-2023. A total of 196 AYP ages 12-25 years participated. Open-ended questions elicited responses regarding AYP knowledge, experiences and perceptions of climate change. Using NVivo software, translated transcripts were coded to explore and synthesise key thematic areas.

Results: Respondents discussed varied climate exposures and associated health risks, for example, how flooding events were impeding access to sexual and reproductive health commodities. Acute climate events like flooding and cyclones increased perceived risk of early marriage and gender-based violence in Bangladesh and Guatemala. In Nigeria, respondents discussed health effects of extreme heat, and how droughts were shifting women into more traditionally male roles in agriculture and income-generating activities, increasing the perceived risk of household tensions and gender-based violence. Commonly reported themes included perceived climate impacts on sexual and reproductive health including early marriage or gender-based violence. Another common theme was anxiety about climate change, its effects on economic and food insecurity in communities and feeling hopeless, lacking agency and not feeling supported by local institutions, all linked with worse mental health.

Conclusion: Our results summarise how AYP perceive climate change is affecting their physical and mental health, finding similarities and differences across these three settings. Our results can inform the development of policies and programmes that directly address AYP needs in a way that is inclusive and responsive.

Introduction: The WHO endorsed the Xpert MTB/RIF (Xpert) technique since 2011 as initial test to diagnose rifampicin-resistant tuberculosis (RR-TB). No systematic review has quantified the proportion of pretreatment attrition in RR-TB patients diagnosed with Xpert in high TB burden countries.Pretreatment attrition for RR-TB represents the gap between patients diagnosed and those who effectively started anti-TB treatment regardless of the reasons (which include pretreatment mortality (death of a diagnosed RR-TB patient before starting adequate treatment) and/or pretreatment loss to follow-up (PTLFU) (drop-out of a diagnosed RR-TB patient before initiation of anti-TB treatment).

Methods: In this systematic review and meta-analysis, we queried EMBASE, PubMed and Web of science to retrieve studies published between 2011 and 22 July 2024, that described pretreatment attrition for RR-TB using Xpert in high TB burden countries. Data on RR-TB patients who did not start treatment after diagnosis and reasons for not starting were extracted in an Excel table. A modified version of the Newcastle-Ottawa scale was used to evaluate the risk of bias among all included studies. The pooled proportion of pretreatment attrition and reasons were assessed using random-effects meta-analysis. Forest plots were generated using R software.

Results: Thirty eligible studies from 21 countries were identified after full-text screening and included in the meta-analysis. Most studies used routine programme data. The pooled proportion of pretreatment attrition in included studies was 18% (95% CI: 12 to 25). PTLFU and pretreatment mortality were, respectively, reported in 10 and nine studies and explained 78% (95% CI: 51% to 92%) and 30% (95% CI: 15% to 52%) of attrition.

Conclusion: Pretreatment attrition was widespread, with significant heterogeneity between included studies. National TB programmes should ensure accurate data collection and reporting of pretreatment attrition to enable reliable overall control strategies.

Prospero registration number: CRD42022321509.

Cholera has remained a persistent public health challenge in Zambia since the country's first reported outbreak in 1977. The recent outbreak, which began in October 2023 and is ongoing as of June 2024, is the most severe in Zambia's history and part of the larger 2022-2024 Southern Africa cholera outbreak, which has affected multiple countries in the region. This article describes the implementation of the integrated community strategy for cholera control (ICSCC) in three districts of the Copperbelt Province during this outbreak. The ICSCC is a comprehensive, community-centric public health approach that integrates surveillance, case management, water, sanitation and hygiene interventions, community engagement and infection prevention measures. The strategy's implementation involved deploying multidisciplinary technical teams, training community-based volunteers and healthcare workers in the affected communities. This approach led to a rapid reduction in cholera cases and mortality, largely due to enhanced surveillance, community education sessions and improved sanitation practices. The ICSCC also improved stakeholder coordination and enabled rapid communication for early response to cholera hotspots. Key lessons learnt include the importance of robust coordination, early community involvement and context-specific adaptations. The strategy's emphasis on data-driven decision-making and adaptation to local socio-cultural dynamics was crucial for its effectiveness. These findings underscore the potential of integrated community-based approaches in managing cholera outbreaks, enhancing public health preparedness and building long-term resilience. The ICSCC strategy offers a scalable model for regions facing similar public health challenges, providing valuable insights for policymakers and practitioners on the effectiveness of community involvement in managing public health crises.