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Mohy A, Lagoubi Y, Gomez JA, Amadou B, Bouskraoui M. Health economic evaluation of 2-dose and 3-dose rotavirus vaccines in children below 5 years of age in Morocco. Hum Vaccin Immunother 2024; 20:2353480. [PMID: 38757507 PMCID: PMC11110695 DOI: 10.1080/21645515.2024.2353480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 05/07/2024] [Indexed: 05/18/2024] Open
Abstract
Following the introduction of rotavirus vaccination into the Moroccan National Immunization Program, the prevalence of the disease has decreased by nearly 50%. However, evidence on the economic value of rotavirus vaccinations in Morocco is limited. This health economic analysis evaluated, from both country payer and societal perspectives, the costs and the cost-effectiveness of three rotavirus vaccines using a static, deterministic, population model in children aged < 5 years in Morocco. Included vaccines were HRV (2-dose schedule), HBRV (3-dose schedule) and BRV-PV 1-dose vial (3-dose schedule). One-way and probabilistic sensitivity analyses were conducted to assess the impact of uncertainty in model inputs. The model predicted that vaccination with HRV was estimated to result in fewer rotavirus gastroenteritis events (-194 homecare events, -57 medical visits, -8 hospitalizations) versus the 3-dose vaccines, translating into 7 discounted quality-adjusted life years gained over the model time horizon. HRV was associated with lower costs versus HBRV from both the country payer (-$1.8 M) and societal (-$4.1 M) perspectives, and versus BRV-PV 1-dose vial from the societal perspective (-$187,000), dominating those options in the cost-effectiveness analysis. However, costs of BRV-PV 1-dose vial were lower than HRV from the payer perspective, resulting in an ICER of approximately $328,376 per QALY, above the assumed cost effectiveness threshold of $3,500. Vaccination with a 2-dose schedule of HRV may be a cost-saving option and could lead to better health outcomes for children in Morocco versus 3-dose schedule rotavirus vaccines.
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Affiliation(s)
- Ahmed Mohy
- Value Evidence & Outcomes Emerging Markets, GSK, Wavre, Belgium
| | | | - Jorge A. Gomez
- Vaccines, Emerging Markets, GSK, Buenos Aires, Argentina
| | - Barry Amadou
- Vaccines Emerging Markets, GSK, Casablanca, Morocco
| | - Mohammed Bouskraoui
- Faculté de Médecine et de Pharmacie, Cadi Ayyad University, Marrakech, Morocco
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Mohy A, Page N, Boyce W, Gomez JA. Economic Evaluation of Rotavirus Vaccination in Children Aged Under Five Years in South Africa. Clin Drug Investig 2023; 43:851-863. [PMID: 37831397 PMCID: PMC10632264 DOI: 10.1007/s40261-023-01312-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2023] [Indexed: 10/14/2023]
Abstract
BACKGROUND AND OBJECTIVE Evidence on the economic value of rotavirus vaccines in middle-income countries is limited. We aimed to model the implementation of three vaccines (human rotavirus, live, attenuated, oral vaccine [HRV, 2 doses]; rotavirus vaccine, live, oral, pentavalent [HBRV, 3 doses] and rotavirus vaccine, live attenuated oral, freeze-dried [BRV-PV, 3 doses] presented in 1-dose and 2-dose vials) into the South African National Immunisation Programme. METHODS Cost and cost-effectiveness analyses were conducted to compare three rotavirus vaccines using a static, deterministic, population model in children aged <5 years in South Africa from country payer and societal perspectives. Deterministic and probabilistic sensitivity analyses were conducted to assess the impact of uncertainty in model inputs. RESULTS The human rotavirus, live, attenuated, oral vaccine (HRV) was associated with cost savings versus HBRV from both perspectives, and versus BRV-PV 1-dose vial from the societal perspective. In the cost-effectiveness analysis, HRV was estimated to avoid 1,107 home care rotavirus gastroenteritis (RVGE) events, 247 medical visits, 35 hospitalisations, and 4 RVGE-related deaths versus HBRV and BRV-PV. This translated to 73 quality-adjusted life years gained. HRV was associated with lower costs versus HBRV from both payer (-$3.9M) and societal (-$11.5M) perspectives and versus BRV-PV 1-dose vial from the societal perspective (-$3.8M), dominating those options. HRV was associated with higher costs versus BRV-PV 1-dose vial from the payer perspective and versus BRV-PV 2‑dose vial from both payer and societal perspectives (ICERs: $51,834, $121,171, and $16,717, respectively), exceeding the assumed cost-effectiveness threshold of 0.5 GDP per capita. CONCLUSION Vaccination with a 2-dose schedule of HRV may lead to better health outcomes for children in South Africa compared with the 3-dose schedule rotavirus vaccines.
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Affiliation(s)
- Ahmed Mohy
- GSK, Value Evidence and Outcomes, Emerging Markets, GSK Vaccines, Wavre, Belgium.
| | - Nicola Page
- Center for Enteric Diseases, National Institute for Communicable Diseases (NICD), A Division of the National Health Laboratory Service, Johannesburg, South Africa
- Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | | | - Jorge A Gomez
- GSK, Value Evidence and Outcomes, Emerging Markets, Buenos Aires, Argentina
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Gomez J, Velázquez FR, Guzman-Holst A, Cervantes Apolinar MY, Van Bellinghen LA, Van Vlaenderen I, van Oorschot D. Cost-effectiveness analysis measuring the total costs against the health benefits of three different rotavirus vaccines for Mexico. Hum Vaccin Immunother 2023:2219189. [PMID: 37339232 DOI: 10.1080/21645515.2023.2219189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/05/2023] [Accepted: 05/23/2023] [Indexed: 06/22/2023] Open
Abstract
Rotavirus (RV) infection causes acute rotavirus gastroenteritis (RVGE) in infants. Safe and effective RV vaccines are available, of which Mexico has included one in its national immunization program (NIP) since 2007. Health outcome gains, expressed in quality-adjusted life years (QALYs), and cost improvements are important additional factors for the selection of a NIP vaccine. These two factors were analyzed here for Mexico over one year implementing three RV vaccines: 2-dose Rotarix (HRV), versus 3-dose RotaTeq (HBRV), and 3-dose Rotasiil (BRV-PV), presented in a 1-dose or 2-dose vial). HRV would annually result in discounted QALY gains of 263 extra years compared with the other vaccines by averting an extra 24,022 homecare cases, 10779 medical visits, 392 hospitalizations, and 12 deaths. From a payer's perspective and compared with HRV, BRV-PV 2-dose vial and BRV-PV 1-dose vial would annually result in $13.5 million and $4.6 million net savings, respectively, while HBRV would result in $3.4 million extra costs. The societal perspective may also show savings compared with HRV for BRV-PV 2-dose vial of $4.9 million, while BRV-PV 1-dose vial and HBRV may show extra costs of $4.0 million and $12.1 million respectively. HRV and HBRV were both approved in Mexico, with HRV requiring less investment than HBRV with higher QALY gains and cost savings. The HRV vaccine produced those higher health gains due to its earlier protection and greater coverage achieved after its schedule completion with two doses only, providing full protection at four months of age instead of longer periods for the other vaccines.
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Nymark LS, Miller A, Vassall A. Inclusion of Additional Unintended Consequences in Economic Evaluation: A Systematic Review of Immunization and Tuberculosis Cost-Effectiveness Analyses. PHARMACOECONOMICS - OPEN 2021; 5:587-603. [PMID: 33948928 PMCID: PMC8096359 DOI: 10.1007/s41669-021-00269-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/17/2021] [Indexed: 05/05/2023]
Abstract
OBJECTIVE Our objective was to review economic evaluations of immunization and tuberculosis to determine the extent to which additional unintended consequences were taken into account in the analysis and to describe the methodological approaches used to estimate these, where possible. METHODS We sourced the vaccine economic evaluations from a previous systematic review by Nymark et al. (2009-2015) and searched PubMed/MEDLINE and Embase from 2015 to 2019 using the same search strategy. For tuberculosis economic evaluations, we extracted studies from 2009 to 2019 that were published in a previous review by Siapka et al. We followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidance. Studies were classified according to the categories and subcategories (e.g., herd immunity, non-specific effects, and labor productivity) defined in a framework identifying additional unintended consequences by Nymark and Vassall. Where possible, methods for estimating the additional unintended consequences categories and subcategories were described. We evaluated the reporting quality of included studies according to the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) extraction guideline. RESULTS We identified 177 vaccine cost-effectiveness analyses (CEAs) between 2009 and 2019 that met the inclusion criteria. Of these, 98 included unintended consequences. Of the total 98 CEAs, overall health consequence categories were included 73 times; biological categories: herd immunity 43 times; pathogen response: resistance 15 times; and cross-protection 15 times. For health consequences pertaining to the supply-side (health systems) categories, side effects were included five times. On the nonhealth demand side (intrahousehold), labor productivity was included 60 times. We identified 29 tuberculosis CEAs from 2009 to 2019 that met the inclusion criteria. Of these, six articles included labor productivity, four included indirect transmission effects, and one included resistance. Between 2009 and 2019, only 34% of tuberculosis CEAs included additional unintended consequences, compared with 55% of vaccine CEAs. CONCLUSIONS The inclusion of additional unintended consequences in economic evaluations of immunization and tuberculosis continues to be limited. Additional unintended consequences of economic benefits, such as those examined in this review and especially those that occur outside the health system, offer valuable information to analysts. Further work on appropriate ways to value these additional unintended consequences is still warranted.
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Affiliation(s)
- Liv Solvår Nymark
- Department of Global Health, The Academic Medical Center (AMC), The University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | | | - Anna Vassall
- Department of Global Health, The Academic Medical Center (AMC), The University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
- Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
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Nagi MA, Luangsinsiri C, Thavorncharoensap M. A systematic review of economic evaluations of vaccines in Middle East and North Africa countries: is existing evidence good enough to support policy decision-making? Expert Rev Pharmacoecon Outcomes Res 2021; 21:1159-1178. [PMID: 34252335 DOI: 10.1080/14737167.2021.1954508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
INTRODUCTION A vaccine introduction process should be systematic and transparent and take into account many factors, including cost-effectiveness evidence. This study aimed to assess quantity, characteristic, and quality of economic evaluation (EE) studies on vaccines performed in Middle East and North Africa (MENA) countries. AREAS COVERED PubMed and Scopus electronic databases were searched since inception to December 2019 to identify published EE studies of vaccines, which were conducted in the 26 MENA countries. Methodological quality of the included studies was evaluated using the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) checklist. EXPERT OPINION Of the 616 studies identified, 46 were included in the review. Most studies (65%) were conducted in Iran, Israel, and Turkey. The most commonly evaluated vaccines were rotavirus vaccine (n = 15; 33%), human Papillomavirus vaccine (n = 8; 17%), and pneumococcal vaccine (n = 7; 15%). We classified 5 (11%), 27 (59%), 12 (26%), and 2 (4%) studies as excellent, good, moderate, and poor quality, respectively. There were limited cost-effectiveness evidences in the region. It is imperative to have local guidelines on good practice and reporting, availability of local data, and funding sources to improve quantity and quality of EE studies of vaccines in the region, thereby, facilitating transparent and consistent decision-making processes.
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Affiliation(s)
- Mouaddh Abdulmalik Nagi
- Doctor of Philosophy Program in Social, Economic, and Administrative Pharmacy, Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand.,Faculty of Medical Sciences, Aljanad University for Science and Technology, Taiz, Yemen
| | - Chaisiri Luangsinsiri
- Doctor of Philosophy Program in Social, Economic, and Administrative Pharmacy, Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand.,Department of Clinical Pharmacy, Faculty of Pharmacy, Srinakharinwirot University, Nakhon Nayok, Thailand
| | - Montarat Thavorncharoensap
- Social and Administrative Pharmacy Excellence Research (SAPER) Unit, Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Rajathevi, Bangkok, Thailand
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Saokaew S, Prasitsuebsai W, Bibera GL, Kengkla K, Zhang XH, Oh KB, Lee C. Economic Evaluation of Human Rotavirus Vaccine in Thailand. Infect Dis Ther 2019; 8:397-415. [PMID: 31197662 PMCID: PMC6702508 DOI: 10.1007/s40121-019-0246-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Indexed: 01/07/2023] Open
Abstract
INTRODUCTION Rotavirus gastroenteritis is the leading cause of severe diarrhoea among young children < 5 years old. Previous cost-effectiveness analyses on rotavirus (RV) vaccination in Thailand have generated conflicting results. The aim of this current study is to evaluate the economic impact of introducing RV vaccination in Thailand, using updated Thai epidemiological and cost data. METHODS Both cost-utility analysis (CUA) and budget impact analysis (BIA) of human rotavirus vaccine (HRV) under a universal mass vaccination (UMV) programme were conducted. A published static, deterministic, cross-sectional population model was adapted to assess costs and health outcomes associated with RV vaccination among Thai children < 5 years old during 1 year for CUA and over a 5-year period (2019-2023) for BIA. Data identified through literature review were incorporated into the model after consultation with local experts. Base case CUA was conducted from a societal perspective with quality-adjusted life year (QALY) discounted at 3% annually. Scenario analyses as well as one-way and probabilistic sensitivity analyses were conducted to assess the robustness of the base case CUA results. Costs were updated to 2017. RESULTS At 99% coverage, HRV vaccination would substantially reduce RV-related disease burden. With an incremental cost-effectiveness ratio (ICER) of Thai baht (THB) 49,923/QALY gained, HRV vaccination versus no vaccination was cost-effective when assessed against a local threshold of THB 160,000/QALY gained. Scenario and sensitivity analyses confirmed the cost-effectiveness with all resultant ICERs falling below the willingness-to-pay threshold. HRV use in the UMV programme was estimated to result in a net expenditure of about THB 255-281 million to the Thai government in the 5th year of the programme, depending on vaccine uptake. CONCLUSION HRV vaccination is estimated to be cost-effective in Thailand. The budget impact following inclusion of HRV into the UMV programme is expected to be partially offset by substantial reductions in RV-related disease costs. FUNDING GlaxoSmithKline Biologicals SA GSK STUDY IDENTIFIER: HO-17-18213.
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Affiliation(s)
- Surasak Saokaew
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand ,Center of Pharmaceutical Outcomes Research (CPOR), Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand ,Unit of Excellence on Herbal Medicine, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand ,School of Pharmacy, Monash University Malaysia, Subang Jaya, Malaysia
| | | | | | - Kirati Kengkla
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
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Voronova V, Zhudenkov K, Helmlinger G, Peskov K. Interpretation of metabolic memory phenomenon using a physiological systems model: What drives oxidative stress following glucose normalization? PLoS One 2017; 12:e0171781. [PMID: 28178319 PMCID: PMC5298285 DOI: 10.1371/journal.pone.0171781] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/25/2017] [Indexed: 02/07/2023] Open
Abstract
Hyperglycemia is generally associated with oxidative stress, which plays a key role in diabetes-related complications. A complex, quantitative relationship has been established between glucose levels and oxidative stress, both in vitro and in vivo. For example, oxidative stress is known to persist after glucose normalization, a phenomenon described as metabolic memory. Also, uncontrolled glucose levels appear to be more detrimental to patients with diabetes (non-constant glucose levels) vs. patients with high, constant glucose levels. The objective of the current study was to delineate the mechanisms underlying such behaviors, using a mechanistic physiological systems modeling approach that captures and integrates essential underlying pathophysiological processes. The proposed model was based on a system of ordinary differential equations. It describes the interplay between reactive oxygen species production potential (ROS), ROS-induced cell alterations, and subsequent adaptation mechanisms. Model parameters were calibrated using different sources of experimental information, including ROS production in cell cultures exposed to various concentration profiles of constant and oscillating glucose levels. The model adequately reproduced the ROS excess generation after glucose normalization. Such behavior appeared to be driven by positive feedback regulations between ROS and ROS-induced cell alterations. The further oxidative stress-related detrimental effect as induced by unstable glucose levels can be explained by inability of cells to adapt to dynamic environment. Cell adaptation to instable high glucose declines during glucose normalization phases, and further glucose increase promotes similar or higher oxidative stress. In contrast, gradual ROS production potential decrease, driven by adaptation, is observed in cells exposed to constant high glucose.
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Affiliation(s)
| | | | - Gabriel Helmlinger
- Quantitative Clinical Pharmacology, Early Clinical Development, Innovative Medicines, AstraZeneca Pharmaceuticals, Boston, Massachusetts, United States of America
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Zhang S, Yin J, Yang J, Tian L, Li D, Zhang Q, Chen J, Xu W, Zhou X. Epidemiology and genetic diversity of group A rotavirus in acute diarrhea patients in pre-vaccination era in southwest China. J Med Virol 2016; 89:71-78. [DOI: 10.1002/jmv.24606] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Shunxian Zhang
- National Institute of Parasitic Diseases; Chinese Center for Disease Control and Prevention; Shanghai People's Republic of China
- Key Laboratory for Parasitology and Vector Biology; MOH of China; WHO Collaborating Center for Tropical Diseases; National Center for International Research on Tropical Diseases; Shanghai People's Republic of China
| | - Jianwen Yin
- Yunnan Provincial Center for Disease Control and Prevention; Kunming People's Republic of China
| | - Jinhui Yang
- The first people's Hospital of Yunnan province; Kunming People's Republic of China
| | - Liguang Tian
- National Institute of Parasitic Diseases; Chinese Center for Disease Control and Prevention; Shanghai People's Republic of China
- Key Laboratory for Parasitology and Vector Biology; MOH of China; WHO Collaborating Center for Tropical Diseases; National Center for International Research on Tropical Diseases; Shanghai People's Republic of China
| | - Dandi Li
- National Institute for Viral Disease Control and Prevention; Chinese Center for Disease Control and Prevention; Beijing People's Republic of China
| | - Qing Zhang
- National Institute for Viral Disease Control and Prevention; Chinese Center for Disease Control and Prevention; Beijing People's Republic of China
| | - Jiaxu Chen
- National Institute of Parasitic Diseases; Chinese Center for Disease Control and Prevention; Shanghai People's Republic of China
- Key Laboratory for Parasitology and Vector Biology; MOH of China; WHO Collaborating Center for Tropical Diseases; National Center for International Research on Tropical Diseases; Shanghai People's Republic of China
| | - Wen Xu
- Yunnan Provincial Center for Disease Control and Prevention; Kunming People's Republic of China
| | - Xiaonong Zhou
- National Institute of Parasitic Diseases; Chinese Center for Disease Control and Prevention; Shanghai People's Republic of China
- Key Laboratory for Parasitology and Vector Biology; MOH of China; WHO Collaborating Center for Tropical Diseases; National Center for International Research on Tropical Diseases; Shanghai People's Republic of China
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