Hiromasa Okayasu

680 total citations
25 papers, 472 citations indexed

About

Hiromasa Okayasu is a scholar working on Cardiology and Cardiovascular Medicine, Infectious Diseases and Epidemiology. According to data from OpenAlex, Hiromasa Okayasu has authored 25 papers receiving a total of 472 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Cardiology and Cardiovascular Medicine, 19 papers in Infectious Diseases and 11 papers in Epidemiology. Recurrent topics in Hiromasa Okayasu's work include Viral Infections and Immunology Research (21 papers), Viral gastroenteritis research and epidemiology (17 papers) and Respiratory viral infections research (9 papers). Hiromasa Okayasu is often cited by papers focused on Viral Infections and Immunology Research (21 papers), Viral gastroenteritis research and epidemiology (17 papers) and Respiratory viral infections research (9 papers). Hiromasa Okayasu collaborates with scholars based in Switzerland, United States and Pakistan. Hiromasa Okayasu's co-authors include Roland W. Sutter, Wilfried A.M. Bakker, Cécil Czerkinsky, Pearay L. Ogra, Marina Takane, R. Bruce Aylward, Hamid Jafari, Darin Zehrung, Courtney Jarrahian and Pauline Verdijk and has published in prestigious journals such as The Journal of Infectious Diseases, PLoS Medicine and BMC Public Health.

In The Last Decade

Hiromasa Okayasu

25 papers receiving 446 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiromasa Okayasu Switzerland 15 326 319 117 72 44 25 472
Julie Garon United States 10 422 1.3× 366 1.1× 180 1.5× 109 1.5× 51 1.2× 22 601
Festus Adu Nigeria 10 292 0.9× 270 0.8× 183 1.6× 40 0.6× 47 1.1× 15 449
Simona Zipursky United States 11 227 0.7× 163 0.5× 87 0.7× 89 1.2× 25 0.6× 19 344
Pascal Mkanda Republic of the Congo 14 321 1.0× 266 0.8× 118 1.0× 173 2.4× 25 0.6× 31 540
Ziping Miao China 12 222 0.7× 126 0.4× 151 1.3× 15 0.2× 20 0.5× 43 385
Moses Olubusuyi Adewumi Nigeria 14 244 0.7× 129 0.4× 277 2.4× 7 0.1× 19 0.4× 75 541
Emmanuel Abanida Nigeria 11 280 0.9× 247 0.8× 138 1.2× 181 2.5× 53 1.2× 17 498
Dominika A. Kalkowska United States 20 872 2.7× 869 2.7× 156 1.3× 42 0.6× 34 0.8× 48 1.0k
Elias Durry United States 12 247 0.8× 111 0.3× 160 1.4× 56 0.8× 19 0.4× 15 378
Abhishek Kunwar India 8 138 0.4× 141 0.4× 63 0.5× 21 0.3× 19 0.4× 17 224

Countries citing papers authored by Hiromasa Okayasu

Since Specialization
Citations

This map shows the geographic impact of Hiromasa Okayasu'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 Hiromasa Okayasu with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hiromasa Okayasu more than expected).

Fields of papers citing papers by Hiromasa Okayasu

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hiromasa Okayasu. 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 Hiromasa Okayasu. The network helps show where Hiromasa Okayasu may publish in the future.

Co-authorship network of co-authors of Hiromasa Okayasu

This figure shows the co-authorship network connecting the top 25 collaborators of Hiromasa Okayasu. A scholar is included among the top collaborators of Hiromasa Okayasu 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 Hiromasa Okayasu. Hiromasa Okayasu is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sutter, Roland W., et al.. (2024). Inactivated Poliovirus Vaccine: Recent Developments and the Tortuous Path to Global Acceptance. Pathogens. 13(3). 224–224. 5 indexed citations
2.
Okayasu, Hiromasa, et al.. (2023). Promoting healthy ageing in the Western Pacific: A mini review of good practices and policy responses. Global Health & Medicine. 5(5). 264–270. 4 indexed citations
3.
Okayasu, Hiromasa, et al.. (2023). Developing and translating knowledge for healthy ageing. The Lancet Regional Health - Western Pacific. 35. 100751–100751. 1 indexed citations
4.
5.
Giersing, Birgitte, Anna-Léa Kahn, Courtney Jarrahian, et al.. (2017). Challenges of vaccine presentation and delivery: How can we design vaccines to have optimal programmatic impact?. Vaccine. 35(49). 6793–6797. 24 indexed citations
6.
Molodecky, Natalie A., Isobel M. Blake, Kathleen O’Reilly, et al.. (2017). Risk factors and short-term projections for serotype-1 poliomyelitis incidence in Pakistan: A spatiotemporal analysis. PLoS Medicine. 14(6). e1002323–e1002323. 20 indexed citations
7.
Okayasu, Hiromasa, et al.. (2016). Development of inactivated poliovirus vaccine from Sabin strains: A progress report. Biologicals. 44(6). 581–587. 38 indexed citations
8.
Datta, Siddhartha Sankar, et al.. (2016). Using short-message-service notification as a method to improve acute flaccid paralysis surveillance in Papua New Guinea. BMC Public Health. 16(1). 409–409. 6 indexed citations
9.
Resik, Sonia, Alina Tejeda, Manuel Dı́az, et al.. (2016). Boosting Immune Responses Following Fractional-Dose Inactivated Poliovirus Vaccine: A Randomized, Controlled Trial. The Journal of Infectious Diseases. 215(2). jiw492–jiw492. 14 indexed citations
10.
Resik, Sonia, Alina Tejeda, Magilé Fonseca, et al.. (2015). Decay of Sabin inactivated poliovirus vaccine (IPV)-boosted poliovirus antibodies. PubMed. 4. 71–74. 9 indexed citations
11.
Verdijk, Pauline, Nynke Y. Rots, Monique G.C.T. van Oijen, et al.. (2014). Safety and immunogenicity of a primary series of Sabin-IPV with and without aluminum hydroxide in infants. Vaccine. 32(39). 4938–4944. 32 indexed citations
12.
Chandir, Subhash, Abdullah H Baqui, Roland W. Sutter, et al.. (2014). Effect of Buffer on the Immune Response to Trivalent Oral Poliovirus Vaccine in Bangladesh: A Community Based Randomized Controlled Trial. The Journal of Infectious Diseases. 210(suppl 1). S390–S397. 5 indexed citations
13.
Okayasu, Hiromasa, et al.. (2014). Lot Quality Assurance Sampling to Monitor Supplemental Immunization Activity Quality: An Essential Tool for Improving Performance in Polio Endemic Countries. The Journal of Infectious Diseases. 210(suppl_1). S333–S340. 24 indexed citations
14.
Okayasu, Hiromasa, Alison Brown, Alex Gasasira, et al.. (2014). Cluster Lot Quality Assurance Sampling: Effect of Increasing the Number of Clusters on Classification Precision and Operational Feasibility. The Journal of Infectious Diseases. 210(suppl 1). S341–S346. 3 indexed citations
15.
McKinlay, M A, Marc S. Collett, Mark A. Pallansch, et al.. (2014). Progress in the Development of Poliovirus Antiviral Agents and Their Essential Role in Reducing Risks That Threaten Eradication. The Journal of Infectious Diseases. 210(suppl 1). S447–S453. 43 indexed citations
16.
Habib, Atif, Sajid Soofi, Zaid Bhatti, et al.. (2014). Zinc supplementation fails to increase the immunogenicity of oral poliovirus vaccine: A randomized controlled trial. Vaccine. 33(6). 819–825. 16 indexed citations
17.
Verdijk, Pauline, Nynke Y. Rots, Monique G.C.T. van Oijen, et al.. (2013). Safety and immunogenicity of inactivated poliovirus vaccine based on Sabin strains with and without aluminum hydroxide: A phase I trial in healthy adults. Vaccine. 31(47). 5531–5536. 29 indexed citations
18.
Okayasu, Hiromasa, Roland W. Sutter, Cécil Czerkinsky, & Pearay L. Ogra. (2011). Mucosal immunity and poliovirus vaccines: Impact on wild poliovirus infection and transmission. Vaccine. 29(46). 8205–8214. 32 indexed citations
19.
Ogra, Pearay L., Hiromasa Okayasu, Cécil Czerkinsky, & Roland W. Sutter. (2011). Mucosal immunity to poliovirus. Expert Review of Vaccines. 10(10). 1389–1392. 13 indexed citations
20.
Rondy, Marc, Alex Gasasira, Emmanuel Abanida, et al.. (2011). Clustered lot quality assurance sampling: a pragmatic tool for timely assessment of vaccination coverage. Tropical Medicine & International Health. 16(7). 863–868. 20 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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