John Ojal

2.0k total citations
29 papers, 748 citations indexed

About

John Ojal is a scholar working on Epidemiology, Health and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, John Ojal has authored 29 papers receiving a total of 748 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Epidemiology, 4 papers in Health and 4 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in John Ojal's work include Pneumonia and Respiratory Infections (14 papers), Respiratory viral infections research (12 papers) and Pneumocystis jirovecii pneumonia detection and treatment (7 papers). John Ojal is often cited by papers focused on Pneumonia and Respiratory Infections (14 papers), Respiratory viral infections research (12 papers) and Pneumocystis jirovecii pneumonia detection and treatment (7 papers). John Ojal collaborates with scholars based in Kenya, United Kingdom and United States. John Ojal's co-authors include J. Anthony G. Scott, Kevin Marsh, Norbert Peshu, Benjamin Tsofa, Thomas N. Williams, Hellen Gatakaa, Evasius Bauni, Jennifer C. Moïsi, Sassy Molyneux and Christopher Nyundo and has published in prestigious journals such as Nature Communications, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

John Ojal

28 papers receiving 739 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John Ojal Kenya 14 329 164 110 100 94 29 748
Aristide Aplogan France 10 91 0.3× 63 0.4× 43 0.4× 93 0.9× 97 1.0× 19 384
Adolfine Hokororo Tanzania 12 80 0.2× 136 0.8× 94 0.9× 107 1.1× 129 1.4× 36 540
L. Chimsuku Malawi 13 124 0.4× 285 1.7× 79 0.7× 368 3.7× 104 1.1× 17 784
Ernest Urassa Tanzania 15 254 0.8× 306 1.9× 47 0.4× 173 1.7× 107 1.1× 25 1.2k
Narcisse Elenga French Guiana 16 253 0.8× 155 0.9× 164 1.5× 151 1.5× 145 1.5× 98 975
Eugene Mutimura Rwanda 18 269 0.8× 77 0.5× 15 0.1× 114 1.1× 30 0.3× 46 989
Blami Dao Burkina Faso 15 116 0.4× 483 2.9× 24 0.2× 277 2.8× 32 0.3× 56 871
Dang Dinh Thoang Vietnam 13 290 0.9× 95 0.6× 18 0.2× 74 0.7× 43 0.5× 15 605
Alemayehu Bekele Ethiopia 14 314 1.0× 60 0.4× 45 0.4× 53 0.5× 88 0.9× 48 635
N. D. Briggs Nigeria 11 43 0.1× 194 1.2× 64 0.6× 185 1.9× 97 1.0× 18 629

Countries citing papers authored by John Ojal

Since Specialization
Citations

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

Fields of papers citing papers by John Ojal

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John Ojal

This figure shows the co-authorship network connecting the top 25 collaborators of John Ojal. A scholar is included among the top collaborators of John Ojal 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 John Ojal. John Ojal 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
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Orangi, Stacey, et al.. (2024). A qualitative inquiry on drivers of COVID-19 vaccine hesitancy among adults in Kenya. SHILAP Revista de lepidopterología. 4(3). e0002986–e0002986. 5 indexed citations
3.
Opi, D. Herbert, Carolyne Ndila, Sophie Uyoga, et al.. (2023). Non-O ABO blood group genotypes differ in their associations with Plasmodium falciparum rosetting and severe malaria. PLoS Genetics. 19(9). e1010910–e1010910. 3 indexed citations
4.
Adamu, Aishatu L., John Ojal, Christy A. N. Okoromah, et al.. (2023). The impact of introduction of the 10-valent pneumococcal conjugate vaccine on pneumococcal carriage in Nigeria. Nature Communications. 14(1). 2666–2666. 6 indexed citations
5.
Thindwa, Deus, Thandie S. Mwalukomo, Kondwani Jambo, et al.. (2022). Risk factors for pneumococcal carriage in adults living with HIV on antiretroviral therapy in the infant pneumococcal vaccine era in Malawi. AIDS. 36(14). 2045–2055. 3 indexed citations
6.
Adamu, Aishatu L., Safiya Gambo, John Ojal, et al.. (2022). The cost of illness for childhood clinical pneumonia and invasive pneumococcal disease in Nigeria. BMJ Global Health. 7(1). e007080–e007080. 9 indexed citations
7.
Orangi, Stacey, et al.. (2022). Examining the unit costs of COVID-19 vaccine delivery in Kenya. BMC Health Services Research. 22(1). 439–439. 11 indexed citations
8.
Thindwa, Deus, Kondwani Jambo, John Ojal, et al.. (2022). Social mixing patterns relevant to infectious diseases spread by close contact in urban Blantyre, Malawi. Epidemics. 40. 100590–100590. 12 indexed citations
9.
Hilton, Joe, Lorenzo Pellis, Samuel P. C. Brand, et al.. (2022). A computational framework for modelling infectious disease policy based on age and household structure with applications to the COVID-19 pandemic. PLoS Computational Biology. 18(9). e1010390–e1010390. 5 indexed citations
10.
Thindwa, Deus, Nicole Wolter, Amy Pinsent, et al.. (2021). Estimating the contribution of HIV-infected adults to household pneumococcal transmission in South Africa, 2016–2018: A hidden Markov modelling study. PLoS Computational Biology. 17(12). e1009680–e1009680. 11 indexed citations
11.
Ojal, John, Donald Akech, James Tuju, et al.. (2021). The importance of supplementary immunisation activities to prevent measles outbreaks during the COVID-19 pandemic in Kenya. BMC Medicine. 19(1). 35–35. 11 indexed citations
12.
Flasche, Stefan, Marc Lipsitch, John Ojal, & Amy Pinsent. (2020). Estimating the contribution of different age strata to vaccine serotype pneumococcal transmission in the pre vaccine era: a modelling study. BMC Medicine. 18(1). 129–129. 27 indexed citations
13.
Ojal, John, Ulla Griffiths, Laura L. Hammitt, et al.. (2019). Sustaining pneumococcal vaccination after transitioning from Gavi support: a modelling and cost-effectiveness study in Kenya. The Lancet Global Health. 7(5). e644–e654. 11 indexed citations
14.
Uyoga, Sophie, Alex Macharia, George Mochamah, et al.. (2019). The epidemiology of sickle cell disease in children recruited in infancy in Kilifi, Kenya: a prospective cohort study. The Lancet Global Health. 7(10). e1458–e1466. 47 indexed citations
15.
Flasche, Stefan, John Ojal, Olivier le Polain de Waroux, et al.. (2017). Assessing the efficiency of catch-up campaigns for the introduction of pneumococcal conjugate vaccine: a modelling study based on data from PCV10 introduction in Kilifi, Kenya. BMC Medicine. 15(1). 113–113. 24 indexed citations
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Rono, Josea, Anna Färnert, Linda Murungi, et al.. (2015). Multiple clinical episodes of Plasmodium falciparum malaria in a low transmission intensity setting: exposure versus immunity. BMC Medicine. 13(1). 114–114. 18 indexed citations
18.
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Tigoi, Caroline, Hellen Gatakaa, Angela Karani, et al.. (2012). Rates of Acquisition of Pneumococcal Colonization and Transmission Probabilities, by Serotype, Among Newborn Infants in Kilifi District, Kenya. Clinical Infectious Diseases. 55(2). 180–188. 53 indexed citations
20.

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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