Abrham Wondimu

Abrham Wondimu

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

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Previous Organizations / Institutes

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Abrham Wondimu has a total of 37 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Cost-effectiveness analysis of quadrivalent and nonavalent human papillomavirus vaccines in Ethiopia

    by Abrham Wondimu, Maarten J. Postma, Marinus van Hulst


  • Open Access

    Rotavirus Vaccination of Infants Delayed and Limited within the National Immunization Programme in the Netherlands: An Opportunity Lost

    by Florian Zeevat, Evgeni Dvortsin, Abrham Wondimu, Jan C. Wilschut, Cornelis Boersma, Maarten J. Postma

    In this study, we estimated the benefits of rotavirus vaccination for infants had the rotavirus vaccine been introduced in the Netherlands as of its market authorization in 2006. An age-structured, deterministic cohort model was developed to simulate different birth cohorts over a period of 15 years from 2006 until 2021, comparing both universal and targeted high-risk group vaccination to no vaccination. Different scenarios for the duration of protection (5 or 7 years) and herd immunity (only for universal vaccination) were analyzed. All birth cohorts together included 2.6 million infants, of which 7.9% were high-risk individuals, and an additional 13.2 million children between 1–15 years born prior to the first cohort in 2006. The costs and health outcomes associated with rotavirus vaccination were calculated per model scenario and discounted at 4% and 1.5%, respectively. Our analysis reveals that, had rotavirus vaccination been implemented in 2006, it would have prevented 356,800 (51% decrease) and 32,200 (5% decrease) cases of rotavirus gastroenteritis after universal and targeted vaccination, respectively. Over the last 15 years, this would have led to significant avoided costs and quality-adjusted life year losses for either vaccination strategy with the most favorable outcomes for universal vaccination. Clearly, an opportunity has been lost.


  • Open Access

    Understanding the Improvement in Full Childhood Vaccination Coverage in Ethiopia Using Oaxaca–Blinder Decomposition Analysis

    by Abrham Wondimu, Qi Cao, Derek Asuman, Josué Almansa, Maarten J. Postma, Marinus van Hulst

    In Ethiopia, full vaccination coverage among children aged 12–23 months has improved in recent decades. This study aimed to investigate drivers of the improvement in the vaccination coverage. The Oaxaca–Blinder decomposition technique was applied to identify the drivers using data from Ethiopian Demographic and Health Survey conducted in 2000 and 2016. The vaccination coverage rose from 14.3% in 2000 to 38.5% in 2016. The decomposition analysis showed that most of the rise in vaccination coverage (73.7%) resulted from the change in the effect of explanatory variables over time and other unmeasured characteristics. Muslim religion had a counteracting effect on the observed increase in vaccination coverage. The remaining 26.3% of the increase was attributed to the change in the composition of the explanatory variables between 2000 and 2016, with maternal educational level and maternal health care utilization as significant contributors. The findings highlight the need for further improvements in maternal health care utilization and educational status to maintain the momentum towards universal coverage of childhood vaccination. Targeted intervention among Muslim-dominated communities is also needed to improve the current situation. Besides which, future studies need to be conducted to identify additional potential modifiable factors.


  • Open Access

    Inequalities in Rotavirus Vaccine Uptake in Ethiopia: A Decomposition Analysis

    by Abrham Wondimu, Jurjen van der Schans, Marinus van Hulst, Maarten J. Postma

    A previous study in Ethiopia reported significant variation in rotavirus vaccine uptake across socioeconomic strata. This study aims to quantify socioeconomic inequality of rotavirus vaccine uptake in Ethiopia and to identify the contributing factors for the inequality. The concentration curve (CC) and the Erreygers Normalized Concentration Index (ECI) were used to assess the socioeconomic related inequality in rotavirus vaccine uptake using data from the 2016 Ethiopian Demographic and Health Survey. Decomposition analysis was conducted to identify the drivers of inequalities. The CC for rotavirus vaccine uptake lay below the line of equality and the ECI was 0.270 (p < 0.001) indicating that uptake of rotavirus vaccine in Ethiopia was significantly concentrated among children from families with better socioeconomic status. The decomposition analysis showed that underlining inequalities in maternal health care services utilization, including antenatal care use (18.4%) and institutional delivery (8.1%), exposure to media (12.8%), and maternal educational level (9.7%) were responsible for the majority of observed inequalities in the uptake of rotavirus vaccine. The findings suggested that there is significant socioeconomic inequality in rotavirus vaccine uptake in Ethiopia. Multi-sectoral actions are required to reduce the inequalities, inclusive increasing maternal health care services, and educational attainments among economically disadvantaged mothers.


  • Open Access

    Factors associated with the uptake of newly introduced childhood vaccinations in Ethiopia: the cases of rotavirus and pneumococcal conjugate vaccines

    by Abrham Wondimu, Qi Cao, Jan C. Wilschut, Maarten J. Postma

    Background: Childhood immunization programmes have made substantial contributions to lowering the burden of disease among children in developing countries, however a large proportion of children still remain unimmunized. This study aimed to explore the determinants of rotavirus vaccine (RVV) and pneumococcal conjugate vaccine (PCV) uptake in Ethiopia. Methods: The 2016 Ethiopian demographic and health survey dataset was used in this analysis. A total of 2004 children aged 12–23 months were included in the analysis. A multivariable logistic regression model was employed to identify the determinants of uptake of the complete schedules of RVV (two doses) and PCV (three doses). Crude and adjusted odds ratios with 95% confidence intervals (CIs) were calculated. Results: The uptakes of the complete schedules of RVV and PCV among children aged 12–23 months were 56 and 49.1%, respectively. The likelihood of immunization with the complete schedule of RVV was significantly lower among children from the relatively poor Afar region in Ethiopia (AOR 0.16; 95%-CI 0.04–0.61). Similarly, children living in not only the Afar region (AOR 0.10; 95%-CI 0.03–0.38), but also the Gambela region (AOR 0.25; 95%-CI 0.08–0.83), were less likely to be vaccinated with PCV. On the other hand, children from more wealthy households had higher odds of vaccination with RVV (AOR 1.69; 95%-CI 1.04–2.75). Also attending antenatal care (ANC) was found to be significantly associated with uptake of the complete schedule of RVV and PCV. Conclusions: The uptake of RVV and PCV is suboptimal in Ethiopia. The uptake of the vaccines were found to be associated with region, ANC use and wealth status.


  • Open Access

    Availability and affordability of priority life-saving medicines for under-five children in health facilities of Tigray region, northern Ethiopia

    by Solomon Abrha, Ebisa Tadesse, Tesfay Mehari Atey, Fantahun Molla, Wondim Melkam, Birhanetensay Masresha, Solomon Gashaw, Abrham Wondimu

    In developing countries, child health outcomes are influenced by the non-availability of priority life-saving medicines at public sector health facilities and non-affordability of medicines at private medicine outlets. This study aimed to assess availability, price components and affordability of priority life-saving medicines for under-five children in Tigray region, Northern Ethiopia. A cross-sectional study was conducted in Tigray region from December 2015 to July 2016 using a standard method developed by the World Health Organization and Health Action International (WHO/HAI). Data on the availability and price of 27 priority life-saving medicines were collected from 31 public and 10 private sectors. Availability and prices were expressed in percent and median price ratios (MPRs), respectively. Affordability was reported in terms of the daily wage of the lowest-paid unskilled government worker. The overall availability of priority life-saving drugs in this study was low (34.1%). The average availabilities of all surveyed medicines in public and private sectors were 41.9 and 31.5%, respectively. The overall availability of medicines for malaria was found to be poor with average values of 29.3% for artemisinin combination therapy tablet, 19.5% for artesunate injection and 0% for rectal artesunate. Whereas, the availability of oral rehydration salt (ORS) and zinc sulphate dispersible tablets for the treatment of diarrhea was moderately high (90% for ORS and 82% for zinc sulphate). Medicines for pneumonia showed an overall percent availability in the range of 0% (ampicillin 250 mg and 1 g powder for injection and oxygen medicinal gas) to 100% (amoxicillin 500 mg capsule). The MPRs of 12 lowest price generic medicines were 1.5 and 2.7 times higher than the international reference prices (IRPs) for the private and public sectors, respectively. About 30% of priority life-saving medicines in the public sector and 50% of them in the private sector demanded above a single daily wages to purchase the standard treatment of the prevalent diseases of children. The lower availability, high price and low affordability of lowest price generic priority life-saving medicines in public and private sectors reflect a failure to implement the health policy on priority life-saving medicines in the region.


  • Cost Effectiveness of Human Papillomavirus Vaccination for Men Who have Sex with Men; Reviewing the Available Evidence

    by Didik Setiawan, Abrham Wondimu, KohJun Ong, Albert Jan van Hoek, Maarten J. Postma

    Men who have sex with men require special attention for human papillomavirus vaccination given elevated infection risks and the development of, in particular, anal cancer.


  • Open Access

    Prescription drug use during pregnancy in Southern Tigray region, North Ethiopia

    by Fantahun Molla, Admassu Assen, Solomon Abrha, Birhanetensay Masresha, Arega Gashaw, Abrham Wondimu, Yared Belete, Wondim Melkam

    Judicious utilization of drugs rescues the fetus from the harmful effects while treating the health problems of the pregnant women. This study aimed at evaluating drug utilization pattern and its associated factors among pregnant women in Southern Tigray, Ethiopia. Institution based cross-sectional study was conducted among 647 pregnant women who had been attending obstetrics-gynecology and antenatal care units in different health facilities of Southern Tigray region. The study participants were selected using multistage sampling technique. Data collection was done using pre-tested semi-structured questionnaires and by reviewing antenatal follow-up cards. Descriptive and inferential statistics were analyzed, to assess drug utilization pattern and its associated factors among pregnant women, using SPSS version 20 software. Of 647 pregnant women, 87.5% were prescribed with at least one medication. As per the United States Food and Drug Administration (US-FDA) risk classification system, 87.7, 7.9, 3.9, and 0.5% of the prescribed drug were from category A, B, C and D, respectively. Prescription drug use was more likely among gynecology ward visitors [AOR = 8.97, 95% Cl (2.69–29.88)] and among those who visited health facilities for the first time during their first [AOR =2.65, 95% Cl (1.44–4.84)] and second [AOR = 2.50, 95% Cl (1.36–4.61)] trimesters. Majority of the study population used safe and appropriate medications according to US-FDA risk classification system, with the exception of low proportion (0.5%) of medication with potential risk for the fetus. The average number of drug prescribed per pregnant women was in the recommended range of WHO drug use indicators guideline.