Stephen Ko

609 total citations
11 papers, 399 citations indexed

About

Stephen Ko is a scholar working on Epidemiology, Hepatology and Infectious Diseases. According to data from OpenAlex, Stephen Ko has authored 11 papers receiving a total of 399 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Epidemiology, 9 papers in Hepatology and 3 papers in Infectious Diseases. Recurrent topics in Stephen Ko's work include Hepatitis B Virus Studies (9 papers), Hepatitis C virus research (6 papers) and Hepatitis Viruses Studies and Epidemiology (5 papers). Stephen Ko is often cited by papers focused on Hepatitis B Virus Studies (9 papers), Hepatitis C virus research (6 papers) and Hepatitis Viruses Studies and Epidemiology (5 papers). Stephen Ko collaborates with scholars based in United States, South Africa and Russia. Stephen Ko's co-authors include Trudy V. Murphy, Sarah Schillie, Tanja Y. Walker, Noele P. Nelson, Sandra A. Morris, Tammy Meyers, Ashraf Coovadia, John W. Ward, Elaine J. Abrams and Fujie Xu and has published in prestigious journals such as Hepatology, PEDIATRICS and The Journal of Infectious Diseases.

In The Last Decade

Stephen Ko

11 papers receiving 391 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Stephen Ko United States	11	336	297	106	36	34	11	399
Antons Mozalevskis Denmark	12	350 1.0×	254 0.9×	133 1.3×	21 0.6×	30 0.9×	34	432
John Rwegasha Tanzania	10	188 0.6×	169 0.6×	72 0.7×	38 1.1×	7 0.2×	14	239
Angeladine Malaha Kenne Cameroon	6	266 0.8×	119 0.4×	115 1.1×	12 0.3×	9 0.3×	8	343
Nikoloz Chkhartishvili Georgia	12	358 1.1×	223 0.8×	255 2.4×	7 0.2×	75 2.2×	54	487
Christinah Mukandavire United Kingdom	11	187 0.6×	95 0.3×	149 1.4×	20 0.6×	14 0.4×	17	257
Roberto Monarca Italy	11	293 0.9×	218 0.7×	153 1.4×	22 0.6×	8 0.2×	15	386
George Psevdos United States	9	166 0.5×	94 0.3×	124 1.2×	13 0.4×	31 0.9×	45	265
Simnikiwe H. Mayaphi South Africa	9	148 0.4×	95 0.3×	93 0.9×	5 0.1×	52 1.5×	17	204
Yaping Qiao China	9	160 0.5×	85 0.3×	85 0.8×	16 0.4×	8 0.2×	25	288
Meredith Reilly United States	6	243 0.7×	167 0.6×	104 1.0×	61 1.7×	11 0.3×	10	311

Countries citing papers authored by Stephen Ko

Since Specialization

Citations

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

Fields of papers citing papers by Stephen Ko

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Stephen Ko

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

All Works

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11 of 11 papers shown

Hagan, Liesl M., Stephanie J. Salyer, Amiran Gamkrelidze, et al.. (2019). Hepatitis C prevalence and risk factors in Georgia, 2015: setting a baseline for elimination. BMC Public Health. 19(S3). 480–480. 42 indexed citations

Tsui, Judith I., Stephen Ko, Evgeny Krupitsky, et al.. (2016). Insights on the Russian HCV care cascade: minimal HCV treatment for HIV/HCV co-infected PWID in St. Petersburg. PubMed. 1(1). 14 indexed citations

Mitruka, Kiren, Tengiz Tsertsvadze, Maia Butsashvili, et al.. (2015). Launch of a Nationwide Hepatitis C Elimination Program — Georgia, April 2015. MMWR Morbidity and Mortality Weekly Report. 64(28). 753–757. 64 indexed citations

Schillie, Sarah, Tanja Y. Walker, Sandra A. Morris, et al.. (2015). Outcomes of Infants Born to Women Infected With Hepatitis B. PEDIATRICS. 135(5). e1141–e1147. 88 indexed citations

Schillie, Sarah, et al.. (2015). Update: Shortened Interval for Postvaccination Serologic Testing of Infants Born to Hepatitis B-Infected Mothers. MMWR Morbidity and Mortality Weekly Report. 64(39). 1118–1120. 32 indexed citations

Zhang, Li, Stephen Ko, Jingjing Lv, et al.. (2014). Perinatal hepatitis B prevention program in Shandong Province, China. Human Vaccines & Immunotherapeutics. 10(9). 2755–2760. 10 indexed citations

Ko, Stephen, et al.. (2014). Hepatitis B vaccine response among infants born to hepatitis B surface antigen-positive women. Vaccine. 32(18). 2127–2133. 27 indexed citations

Ko, Stephen, et al.. (2014). Estimated Annual Perinatal Hepatitis B Virus Infections in the United States, 2000–2009. Journal of the Pediatric Infectious Diseases Society. 5(2). 114–121. 21 indexed citations

Moorman, Anne C., Jian Xing, Stephen Ko, et al.. (2014). Late diagnosis of hepatitis C virus infection in the Chronic Hepatitis Cohort Study (CHeCS): Missed opportunities for intervention. Hepatology. 61(5). 1479–1484. 40 indexed citations

10.

Boscarino, Joseph A., Stuart C. Gordon, Loralee B. Rupp, et al.. (2013). Locations and reasons for initial testing for hepatitis C infection - Chronic Hepatitis Cohort Study, United States, 2006-2010. PubMed Central. 62(32). 645–648. 14 indexed citations

11.

Coovadia, Ashraf, Stephen Ko, Tammy Meyers, et al.. (2010). Initial Response to Protease‐Inhibitor‐Based Antiretroviral Therapy among Children Less than 2 Years of Age in South Africa: Effect of Cotreatment for Tuberculosis. The Journal of Infectious Diseases. 201(8). 1121–1131. 47 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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