LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 87

Search options

  1. Article ; Online: Improving coherence of global research funding: Pandemic PACT.

    Norton, Alice / Sigfrid, Louise / Antonio, Emilia / Bucher, Adrian / Ndwandwe, Duduzile

    Lancet (London, England)

    2024  Volume 403, Issue 10433, Page(s) 1233

    Language English
    Publishing date 2024-03-19
    Publishing country England
    Document type Letter
    ZDB-ID 3306-6
    ISSN 1474-547X ; 0023-7507 ; 0140-6736
    ISSN (online) 1474-547X
    ISSN 0023-7507 ; 0140-6736
    DOI 10.1016/S0140-6736(24)00452-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Positioning implementation science in national immunization programmes to improve coverage equity and advance progress toward Immunization Agenda 2030: An urgent global health imperative.

    Adamu, Abdu A / Ndwandwe, Duduzile / Jalo, Rabiu I / Wiysonge, Charles S

    Human vaccines & immunotherapeutics

    2024  Volume 20, Issue 1, Page(s) 2331872

    Abstract: Despite the availability of effective vaccines for preventing common childhood infectious diseases, there is still significant disparities in access and utilization across many low- and middle-income countries (LMIC). The factors that drive these ... ...

    Abstract Despite the availability of effective vaccines for preventing common childhood infectious diseases, there is still significant disparities in access and utilization across many low- and middle-income countries (LMIC). The factors that drive these disparities are often multilevel, originating from individuals, health facilities, health systems and communities, and also multifaceted. Implementation science has emerged as a field to help address "know-do" gaps in health systems, and can play a significant role in strengthening immunization systems to understand and solve implementation barriers that limit access and uptake within their contexts. This article presents a reflexive perspective on how to position implementation research in immunization programmes to improve coverage equity. Furthermore, key points of synergy between implementation research and vaccination are highlighted, and some potential practice changes that can be applied within specific contexts were proposed. Using a human rights lens, it was concluded that the cost that is associated with implementation failure in immunization programmes is significant and unjust, and future directions for implementation research to optimize its application in practice settings have been recommended.
    MeSH term(s) Humans ; Child ; Global Health ; Implementation Science ; Vaccination ; Immunization ; Vaccines ; Immunization Programs
    Chemical Substances Vaccines
    Language English
    Publishing date 2024-03-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2664176-8
    ISSN 2164-554X ; 2164-5515
    ISSN (online) 2164-554X
    ISSN 2164-5515
    DOI 10.1080/21645515.2024.2331872
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Assessing the Implementation Determinants of Pilot Malaria Vaccination Programs in Ghana, Kenya, and Malawi through a Complexity Lens: A Rapid Review Using a Consolidated Framework for Implementation Research.

    Adamu, Abdu A / Jalo, Rabiu I / Ndwandwe, Duduzile / Wiysonge, Charles S

    Vaccines

    2024  Volume 12, Issue 2

    Abstract: In 2019, national immunization programs in Ghana, Kenya, and Malawi commenced the implementation of RTS,S/AS01 vaccination in large-scale pilot schemes. Understanding the implementation context of this malaria vaccination in the pilot countries can ... ...

    Abstract In 2019, national immunization programs in Ghana, Kenya, and Malawi commenced the implementation of RTS,S/AS01 vaccination in large-scale pilot schemes. Understanding the implementation context of this malaria vaccination in the pilot countries can provide useful insights for enhancing implementation outcomes in new countries. There has not yet been a proper synthesis of the implementation determinants of malaria vaccination programs. A rapid review was conducted to identify the implementation determinants of the pilot malaria vaccination programs in Ghana, Kenya, and Malawi, and describe the mechanism by which these determinants interact with each other. A literature search was conducted in November 2023 in PubMed and Google Scholar to identify those studies that described the factors affecting malaria vaccine implementation in Ghana, Kenya, and Malawi. Thirteen studies conducted between 2021 and 2023 were included. A total of 62 implementation determinants of malaria vaccination across all five domains of the consolidated framework for implementation research (CFIR) were identified. A causal loop diagram showed that these factors are interconnected and interrelated, identifying nine reinforcing loops and two balancing loops. As additional countries in Africa prepare for a malaria vaccine roll-out, it is pertinent to ensure that they have access to adequate information about the implementation context of countries that are already implementing malaria vaccination programs so that they understand the potential barriers and facilitators. This information can be used to inform context-specific systems enhancement to maximize implementation success. Going forward, primary implementation studies that incorporate the causal loop diagram should be integrated into the malaria vaccine implementation program to enable immunization program managers and other key stakeholders to identify and respond to emerging implementation barriers in a timely and systematic manner, to improve overall implementation performance.
    Language English
    Publishing date 2024-01-23
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2703319-3
    ISSN 2076-393X
    ISSN 2076-393X
    DOI 10.3390/vaccines12020111
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Informal health sector and routine immunization: making the case for harnessing the potentials of patent medicine vendors for the big catch-up to reduce zero-dose children in sub-Saharan Africa.

    Adamu, Abdu A / Jalo, Rabiu I / Ndwandwe, Duduzile / Wiysonge, Charles S

    Frontiers in public health

    2024  Volume 12, Page(s) 1353902

    Abstract: The COVID-19 pandemic caused a surge in the number of unimmunized and under-immunized children in Africa. The majority of unimmunized (or zero-dose) children live in hard-to-reach rural areas, urban slums, and communities affected by conflict where ... ...

    Abstract The COVID-19 pandemic caused a surge in the number of unimmunized and under-immunized children in Africa. The majority of unimmunized (or zero-dose) children live in hard-to-reach rural areas, urban slums, and communities affected by conflict where health facilities are usually unavailable or difficult to access. In these settings, people mostly rely on the informal health sector for essential health services. Therefore, to reduce zero-dose children, it is critical to expand immunization services beyond health facilities to the informal health sector to meet the immunization needs of children in underserved places. In this perspective article, we propose a framework for the expansion of immunization services through the informal health sector as one of the pillars for the big catch-up plan to improve coverage and equity. In African countries like Nigeria, Ethiopia, Tanzania, and the Democratic Republic of Congo, patent medicine vendors serve as an important informal health sector provider group, and thus, they can be engaged to provide immunization services. A hub-and-spoke model can be used to integrate patent medicine vendors into the immunization system. A hub-and-spoke model is a framework for organization design where services that are provided by a central facility (hub) are complimented by secondary sites (spokes) to optimize access to care. Systems thinking approach should guide the design, implementation, and evaluation of this model.
    MeSH term(s) Child ; Humans ; Pandemics ; Vaccination ; Immunization ; Nigeria ; Ethiopia
    Language English
    Publishing date 2024-03-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711781-9
    ISSN 2296-2565 ; 2296-2565
    ISSN (online) 2296-2565
    ISSN 2296-2565
    DOI 10.3389/fpubh.2024.1353902
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: COVID-19 vaccines.

    Ndwandwe, Duduzile / Wiysonge, Charles S

    Current opinion in immunology

    2021  Volume 71, Page(s) 111–116

    Abstract: COVID-19 is a pandemic of unprecedented proportions in recent human history. Less than 18 months since the onset of the pandemic, there are close to two hundred million confirmed cases and four million deaths worldwide. There have also been massive ... ...

    Abstract COVID-19 is a pandemic of unprecedented proportions in recent human history. Less than 18 months since the onset of the pandemic, there are close to two hundred million confirmed cases and four million deaths worldwide. There have also been massive efforts geared towards finding safe and effective vaccines. By July 2021 there were 184 COVID-19 vaccine candidates in pre-clinical development, 105 in clinical development, and 18 vaccines approved for emergency use by at least one regulatory authority. These vaccines include whole virus live attenuated or inactivated, protein-based, viral vector, and nucleic acid vaccines. By mid-2021 three billion doses of COVID-19 vaccine have been administered around the world, mostly in high-income countries. COVID-19 vaccination provides hope for an end to the pandemic, if and only if there would be equal access and optimal uptake in all countries around the world.
    MeSH term(s) COVID-19/immunology ; COVID-19/prevention & control ; COVID-19 Vaccines/immunology ; Humans ; Pandemics/prevention & control ; SARS-CoV-2/immunology ; Vaccines, DNA/immunology ; Vaccines, Inactivated/immunology
    Chemical Substances COVID-19 Vaccines ; Vaccines, DNA ; Vaccines, Inactivated
    Language English
    Publishing date 2021-07-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1035767-1
    ISSN 1879-0372 ; 0952-7915
    ISSN (online) 1879-0372
    ISSN 0952-7915
    DOI 10.1016/j.coi.2021.07.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Applying innovative strategies to achieve Universal Health Coverage in the African Region

    Arlette Mouako Leufak / Duduzile Ndwandwe

    South Eastern European Journal of Public Health (2021)

    2021  

    Abstract: Universal health coverage is defined as ensuring that all people have access to needed health services of sufficient quality to be effective while ensuring that these services do not expose the user the financial hardship. Universal health coverage ... ...

    Abstract Universal health coverage is defined as ensuring that all people have access to needed health services of sufficient quality to be effective while ensuring that these services do not expose the user the financial hardship. Universal health coverage includes three related objectives: equity in access to health services (everyone who needs services should get them, not only those who can pay for them); the quality of health services should be good enough to improve the health of those receiving services; and people should be protected against financial risk, ensuring that the cost of using services does not put people at risk of financial harm. Africa still has a long way to go to achieve these objectives. Many barriers limit the progress of the African Region towards building the robust health systems needed for universal health coverage. Such barriers include poor infrastructure, high out-of-pocket payments and catastrophic health expenditures, shortages and inequitable distribution of qualified healthcare workers, poor quality of care delivery, high cost of quality medicines, and lack of innovative technologies appropriate to the range of settings where care is delivered, health financing and governance. This paper aims to propose innovative strategies that could be applied to improve health systems in the Africa Region, which progress towards the continent attaining universal health coverage.
    Keywords Innovative strategies ; Universal health coverage ; African Region ; Public aspects of medicine ; RA1-1270
    Subject code 360
    Language English
    Publishing date 2021-05-01T00:00:00Z
    Publisher Jacobs Verlag
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  7. Article ; Online: Clinical trial registration during COVID-19 and beyond in the African context: what have we learned?

    Mathebula, Lindi / Runeyi, Sinazo / Wiysonge, Charles / Ndwandwe, Duduzile

    Trials

    2022  Volume 23, Issue 1, Page(s) 460

    Abstract: Since the outbreak of COVID-19, many lives have been impacted especially on the African continent which is already fighting the burden of multiple diseases of poverty. However, clinical research has offered hope for treatment and prevention options for ... ...

    Abstract Since the outbreak of COVID-19, many lives have been impacted especially on the African continent which is already fighting the burden of multiple diseases of poverty. However, clinical research has offered hope for treatment and prevention options for this infectious disease. Despite many COVID-19 clinical trials conducted globally, three countries in Africa account for more than 80% of all trials from the continent registered trials in clinical trial registries. This indicates geographic disparity among COVID-19 research in Africa. From the perspective of clinical trial registration, transparency in clinical research and the availability of data became important for making informed decisions to manage the pandemic. Registries serve as a source of planned, ongoing, and completed trials while allowing efficient funding allocation for research that would not duplicate efforts. Additionally, research gaps can be identified, which provide opportunities for collaboration among researchers. Therefore, a critical lesson learnt during this pandemic is that clinical trial registration is important in facilitating the process of tracking changes made to protocols and minimizing publication bias, thereby promoting and advocating for clinical research transparency. Moreover, registration in a clinical trial registry is a condition for publication and allows for trial summary results to be publicly available. Adhering to the principle of results sharing is especially important for the rapidly growing clinical research activities racing to find evidence-based interventions to end the COVID-19 pandemic.
    MeSH term(s) COVID-19 ; Clinical Trials as Topic ; Humans ; Pandemics/prevention & control ; Publication Bias ; Registries ; Research Personnel
    Language English
    Publishing date 2022-06-06
    Publishing country England
    Document type Letter
    ZDB-ID 2040523-6
    ISSN 1745-6215 ; 1468-6694 ; 1745-6215
    ISSN (online) 1745-6215
    ISSN 1468-6694 ; 1745-6215
    DOI 10.1186/s13063-022-06412-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: COVID-19 vaccine demand protest might have increased vaccine acceptance and uptake in South Africa.

    Mavundza, Edison Johannes / Ndwandwe, Duduzile / Wiysonge, Charles Shey

    Human vaccines & immunotherapeutics

    2022  Volume 18, Issue 5, Page(s) 2064691

    Abstract: Safe and efficacious COVID-19 vaccines exist, but their success against the disease depends on public willingness to receive them. Vaccine hesitancy is one major obstacle to the achievement of herd immunity. On 25 June 2021, about 2000 supporters of the ... ...

    Abstract Safe and efficacious COVID-19 vaccines exist, but their success against the disease depends on public willingness to receive them. Vaccine hesitancy is one major obstacle to the achievement of herd immunity. On 25 June 2021, about 2000 supporters of the Economic Freedom Fighters (EFF) (the third biggest political party in South Africa) marched to the offices of the national regulatory authority (NRA) supporting COVID-19 vaccination and demanding approval of two additional vaccines (Sputnik V and Sinovac) in South Africa. The march was led by EFF leader, Julius Malema. By then, only three COVID-19 vaccines had received emergency use authorization in the country-the Janssen, AstraZeneca and Pfizer-BioNtech vaccines. It is worth noting that NRAs should only approve a vaccine if they are satisfied that its benefits outweigh any potential risks and not through political pressure. Nevertheless, we believe that this march might have increased COVID-19 vaccine acceptance and uptake among EFF supporters. The endorsement of COVID-19 vaccines by Malema, an influential political figure in South Africa, probably convinced some vaccine hesitant South Africans that COVID-19 vaccination is important. Therefore, we suggest vaccine endorsement by influential individuals in South Africa as one of the strategies to increase COVID-19 vaccine uptake.
    MeSH term(s) COVID-19/prevention & control ; COVID-19 Vaccines ; Humans ; Patient Acceptance of Health Care ; South Africa ; Vaccination ; Vaccines
    Chemical Substances COVID-19 Vaccines ; Vaccines
    Language English
    Publishing date 2022-04-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2664176-8
    ISSN 2164-554X ; 2164-5515
    ISSN (online) 2164-554X
    ISSN 2164-5515
    DOI 10.1080/21645515.2022.2064691
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Cholera vaccine clinical trials: A cross-sectional analysis of clinical trials registries.

    Mathebula, Lindi / Malinga, Thobile / Mokgoro, Mammekwa / Ndwandwe, Duduzile / Wiysonge, Charles S / Gray, Glenda

    Human vaccines & immunotherapeutics

    2023  Volume 19, Issue 2, Page(s) 2261168

    Abstract: Cholera has been one of the world's biggest public health challenges for centuries. The presence of this disease brings into focus the social determinants of health in different parts of the world. Research and development efforts to find safe and ... ...

    Abstract Cholera has been one of the world's biggest public health challenges for centuries. The presence of this disease brings into focus the social determinants of health in different parts of the world. Research and development efforts to find safe and effective Cholera vaccines are critical to decreasing the disease burden from
    MeSH term(s) Humans ; Cholera/epidemiology ; Cholera/prevention & control ; Cholera Vaccines ; Cross-Sectional Studies ; Registries ; Vibrio cholerae ; Clinical Trials as Topic
    Chemical Substances Cholera Vaccines
    Language English
    Publishing date 2023-09-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2664176-8
    ISSN 2164-554X ; 2164-5515
    ISSN (online) 2164-554X
    ISSN 2164-5515
    DOI 10.1080/21645515.2023.2261168
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Rotavirus vaccine clinical trials: a cross-sectional analysis of clinical trials registries.

    Ndwandwe, Duduzile / Runeyi, Sinazo / Mathebula, Lindi / Wiysonge, Charles

    Trials

    2022  Volume 23, Issue 1, Page(s) 945

    Abstract: Background: Rotavirus is a primary infectious virus causing childhood diarrhoea and is associated with significant mortality in children. Three African countries (Nigeria, the Democratic Republic of Congo, and Angola) are among the five countries that ... ...

    Abstract Background: Rotavirus is a primary infectious virus causing childhood diarrhoea and is associated with significant mortality in children. Three African countries (Nigeria, the Democratic Republic of Congo, and Angola) are among the five countries that account for 50% of all diarrheal-related deaths worldwide. This indicates that much needs to be done to reduce this burden. The World Health Organization International Clinical Trial Registry Platform (WHO ICTRP) is a global repository for primary registries reporting on clinical trials. This study aimed to identify and describe planned, ongoing, and completed rotavirus vaccine trials conducted globally.
    Methods: We searched WHO-ICTRP on 17 June 2021 and conducted a cross-sectional analysis of rotavirus studies listed in the database. Data extraction included trial location, participant age, source of the trial record, trial phase, sponsor, and availability of results. We used the Microsoft Excel 365 package to generate descriptive summary statistics.
    Results: We identified 242 rotavirus vaccine trials registered from 2004 to 2020. Most of these trials were registered retrospectively, with only 26% of the rotavirus vaccine trials reporting the availability of results in their registries. Most of the trials are studying children aged less than 5 years. The recruitment status for these trials is currently shown in the WHO-ICTRP as "not recruiting" for 80.17% of trials, "recruiting" for 11.57% of trials recruiting, and unknown for 6.61% of trials. The continents in which these rotavirus vaccine trials have recruitment sites in Asia (41%) and North America (20%), with the maximum number of trials in the clinical trial registries coming from India (21%) and the USA (11%) with most being sponsored by the pharmaceutical industry. Our analysis shows that only 26% of the rotavirus vaccine trials report the availability of results in their registries.
    Conclusions: Mapping rotavirus vaccine clinical trial activity using data from the WHO ICTRP beneficial provides valuable information on planned, ongoing, or completed trials for researchers, funders, and healthcare decision-makers. Despite the high rotavirus disease burden in low- and middle-income countries, including Africa, there is minimal clinical trial activity related to the condition on the continent. The clinical trial registries as a valuable tool to share interim results of the trials.
    MeSH term(s) Child ; Humans ; Rotavirus Vaccines/adverse effects ; Cross-Sectional Studies ; Retrospective Studies ; Registries ; Nigeria
    Chemical Substances Rotavirus Vaccines
    Language English
    Publishing date 2022-11-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2040523-6
    ISSN 1745-6215 ; 1468-6694 ; 1745-6215
    ISSN (online) 1745-6215
    ISSN 1468-6694 ; 1745-6215
    DOI 10.1186/s13063-022-06878-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top