Sachiko Ozawa

4.9k total citations · 1 hit paper
99 papers, 2.9k citations indexed

About

Sachiko Ozawa is a scholar working on Health, Economics and Econometrics and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Sachiko Ozawa has authored 99 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Health, 31 papers in Economics and Econometrics and 28 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Sachiko Ozawa's work include Vaccine Coverage and Hesitancy (44 papers), Global Maternal and Child Health (21 papers) and Pharmaceutical Economics and Policy (19 papers). Sachiko Ozawa is often cited by papers focused on Vaccine Coverage and Hesitancy (44 papers), Global Maternal and Child Health (21 papers) and Pharmaceutical Economics and Policy (19 papers). Sachiko Ozawa collaborates with scholars based in United States, United Kingdom and South Africa. Sachiko Ozawa's co-authors include Damian Walker, Pooja Sripad, Meghan L. Stack, Bruce Y. Lee, Tatenda T. Yemeke, Sarah M. Bartsch, Benjamin A. Lopman, Aron J. Hall, Allison Portnoy and Daniel R. Evans and has published in prestigious journals such as Proceedings of the National Academy of Sciences, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Sachiko Ozawa

88 papers receiving 2.8k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Global Economic Burden of Norovirus Gastroenteritis

2016 392 citations Sachiko Ozawa, Bruce Y. Lee et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Sachiko Ozawa United States	26	916	835	627	531	520	99	2.9k
Stéphane Verguet United States	34	648 0.7×	406 0.5×	798 1.3×	565 1.1×	576 1.1×	148	3.7k
Sandra Mounier‐Jack United Kingdom	34	1.8k 2.0×	1.2k 1.4×	348 0.6×	1.3k 2.5×	425 0.8×	140	3.7k
Seth Berkley United States	21	456 0.5×	897 1.1×	584 0.9×	687 1.3×	437 0.8×	58	3.6k
Ulla Griffiths United Kingdom	31	946 1.0×	656 0.8×	381 0.6×	1.4k 2.7×	407 0.8×	89	3.4k
Raymond Hutubessy Switzerland	36	1.4k 1.5×	1.0k 1.2×	1.2k 1.9×	1.9k 3.6×	733 1.4×	138	5.3k
Badara Samb Senegal	31	814 0.9×	1.5k 1.8×	313 0.5×	1.3k 2.5×	772 1.5×	65	3.8k
Ali Sié Burkina Faso	36	382 0.4×	502 0.6×	403 0.6×	477 0.9×	1.5k 2.8×	252	4.5k
Nancy Fullman United States	18	322 0.4×	423 0.5×	358 0.6×	333 0.6×	1.8k 3.4×	30	3.5k
Rhoda K. Wanyenze Uganda	27	251 0.3×	1.1k 1.3×	262 0.4×	640 1.2×	308 0.6×	119	2.4k
Frank Odhiambo Kenya	33	454 0.5×	561 0.7×	171 0.3×	485 0.9×	1.2k 2.4×	84	3.5k

Countries citing papers authored by Sachiko Ozawa

Since Specialization

Citations

This map shows the geographic impact of Sachiko Ozawa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Sachiko Ozawa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sachiko Ozawa more than expected).

Fields of papers citing papers by Sachiko Ozawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sachiko Ozawa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Sachiko Ozawa. The network helps show where Sachiko Ozawa may publish in the future.

Co-authorship network of co-authors of Sachiko Ozawa

This figure shows the co-authorship network connecting the top 25 collaborators of Sachiko Ozawa. A scholar is included among the top collaborators of Sachiko Ozawa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Sachiko Ozawa. Sachiko Ozawa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ashenef, Ayenew, Atalay Mulu Fentie, Ibrahim Chikowe, et al.. (2025). Substandard anticancer medications in clinical care settings and private pharmacies in sub-Saharan Africa: a systematic pharmaceutical investigation. The Lancet Global Health. 13(7). e1250–e1257.

Kong, Wei Yi, Kathryn L. Kennedy, Rebecca Carlson, et al.. (2024). Identifying Healthcare Professionals With Lower Human Papillomavirus (HPV) Vaccine Recommendation Quality: A Systematic Review. Journal of Adolescent Health. 74(5). 868–877. 4 indexed citations

Spencer, Jennifer C., Lisa P. Spees, Caitlin B. Biddell, et al.. (2024). Inclusion of marginalized populations in HPV vaccine modeling: A systematic review. Preventive Medicine. 182. 107941–107941. 1 indexed citations

Spees, Lisa P., Caitlin B. Biddell, Tatenda T. Yemeke, et al.. (2024). Benefits, challenges, and strategies related to using presumptive recommendations for HPV vaccination: A qualitative study with rural and non-rural-serving primary care professionals. Human Vaccines & Immunotherapeutics. 20(1). 2347018–2347018. 4 indexed citations

Kong, Wei Yi, Meghan B. Brennan, Amy Liu, et al.. (2024). Identifying and supporting vaccine champions in pediatric primary care: a qualitative interview study. Translational Behavioral Medicine. 14(12). 722–731.

Ozawa, Sachiko, et al.. (2023). How to increase and maintain high immunization coverage: Vaccination Demand Resilience (VDR) framework. Vaccine. 41(45). 6710–6718. 3 indexed citations

Kong, Wei Yi, Tara L. Queen, Nisha C. Gottfredson, et al.. (2023). Impact of visit characteristics on intention to recommend HPV vaccine: An experiment with US health care professionals. Preventive Medicine. 179. 107841–107841. 2 indexed citations

Yemeke, Tatenda T., et al.. (2023). Economic and cost-effectiveness aspects of vaccines in combating antibiotic resistance. Human Vaccines & Immunotherapeutics. 19(1). 11 indexed citations

Yemeke, Tatenda T., et al.. (2023). Impact of the COVID-19 pandemic on the quality of medical products in Zimbabwe: a qualitative study based on key informant interviews with health system stakeholders. BMJ Open. 13(6). e068923–e068923. 3 indexed citations

10.

Tunis, Matthew, Beate Sander, Murray Krahn, et al.. (2023). Guidelines for the Economic Evaluation of Vaccination Programs in Canada. SSRN Electronic Journal. 3 indexed citations

11.

Eckel, Stephen F, et al.. (2022). Accessibility of Low-cost Insulin From Illegitimate Internet Pharmacies: Cross-sectional Study. Journal of Medical Internet Research. 24(2). e25855–e25855. 7 indexed citations

12.

Ozawa, Sachiko, Tatenda T. Yemeke, Patrick T. Wedlock, et al.. (2021). Systematic review of the costs for vaccinators to reach vaccination sites: Incremental costs of reaching hard-to-reach populations. Vaccine. 39(33). 4598–4610. 2 indexed citations

13.

Yemeke, Tatenda T., Patrick T. Wedlock, Sarah Wood Pallas, et al.. (2021). Promoting, seeking, and reaching vaccination services: A systematic review of costs to immunization programs, beneficiaries, and caregivers. Vaccine. 39(32). 4437–4449. 4 indexed citations

14.

Cox, Sarah N., Patrick T. Wedlock, Sarah Wood Pallas, et al.. (2021). A systems map of the economic considerations for vaccination: Application to hard-to-reach populations. Vaccine. 39(46). 6796–6804. 8 indexed citations

15.

Ozawa, Sachiko, et al.. (2021). COVID-19 Treatments Sold Online Without Prescription Requirements in the United States: Cross-sectional Study Evaluating Availability, Safety and Marketing of Medications. Journal of Medical Internet Research. 24(2). e27704–e27704. 13 indexed citations

16.

Ozawa, Sachiko, Tatenda T. Yemeke, Daniel R. Evans, et al.. (2019). Defining hard-to-reach populations for vaccination. Vaccine. 37(37). 5525–5534. 59 indexed citations

17.

Ozawa, Sachiko, Tatenda T. Yemeke, & Kimberly M. Thompson. (2018). Systematic review of the incremental costs of interventions that increase immunization coverage. Vaccine. 36(25). 3641–3649. 29 indexed citations

18.

Ozawa, Sachiko, et al.. (2018). Parents’ preferences for interventions to improve childhood immunization uptake in northern Nigeria. Vaccine. 36(20). 2833–2841. 7 indexed citations

19.

Haidari, Leila A., Shawn T. Brown, Dagna Constenla, et al.. (2016). The economic value of increasing geospatial access to tetanus toxoid immunization in Mozambique. Vaccine. 34(35). 4161–4165. 10 indexed citations

20.

Ozawa, Sachiko & Damian Walker. (2011). Comparison of trust in public vs private health care providers in rural Cambodia. Health Policy and Planning. 26(Suppl. 1). i20–i29. 69 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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