Sami Al-Hajjar

7.3k total citations · 2 hit papers
34 papers, 2.0k citations indexed

About

Sami Al-Hajjar is a scholar working on Epidemiology, Infectious Diseases and Public Health, Environmental and Occupational Health. According to data from OpenAlex, Sami Al-Hajjar has authored 34 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Epidemiology, 9 papers in Infectious Diseases and 8 papers in Public Health, Environmental and Occupational Health. Recurrent topics in Sami Al-Hajjar's work include Respiratory viral infections research (7 papers), Streptococcal Infections and Treatments (5 papers) and Pneumonia and Respiratory Infections (5 papers). Sami Al-Hajjar is often cited by papers focused on Respiratory viral infections research (7 papers), Streptococcal Infections and Treatments (5 papers) and Pneumonia and Respiratory Infections (5 papers). Sami Al-Hajjar collaborates with scholars based in Saudi Arabia, United States and France. Sami Al-Hajjar's co-authors include Alimuddin Zumla, Ziad A. Memish, Fahad Alrabiah, Hatem Q. Makhdoom, Abdullah M. Assiri, Rafat F. Alhakeem, Abdullah A Al-Rabeeah, Hanan H. Balkhy, Wafa N. Al‐Nassir and Jaffar A. Al‐Tawfiq and has published in prestigious journals such as Nature Genetics, Blood and Journal of Clinical Microbiology.

In The Last Decade

Sami Al-Hajjar

30 papers receiving 2.0k citations

Hit Papers

align trajectories sort by overperformance

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.

Epidemiological, demographic, and clinical characteristics of 47 cases of Middle East respiratory syndrome coronavirus disease from Saudi Arabia: a descriptive study

2013 1.0k citations Abdullah M. Assiri, Jaffar A. Al‐Tawfiq et al. The Lancet Infectious Diseases profile →
Impaired response to interferon-α/β and lethal viral disease in human STAT1 deficiency

2003 578 citations Stéphanie Boisson‐Dupuis, Emmanuelle Jouanguy et al. Nature Genetics profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Sami Al-Hajjar Saudi Arabia	14	1.2k	610	595	250	235	34	2.0k
William J. Liu China	21	982 0.8×	361 0.6×	469 0.8×	249 1.0×	121 0.5×	74	1.7k
Thushan I. de Silva United Kingdom	23	1.3k 1.1×	355 0.6×	497 0.8×	189 0.8×	119 0.5×	91	2.2k
Pauline M. E. Wertheim‐van Dillen Netherlands	8	1.1k 1.0×	440 0.7×	837 1.4×	153 0.6×	98 0.4×	12	2.1k
Judith H. Aberle Austria	27	1.5k 1.3×	383 0.6×	1.0k 1.7×	103 0.4×	181 0.8×	83	2.7k
Deborah Cromer Australia	25	2.9k 2.5×	624 1.0×	597 1.0×	170 0.7×	252 1.1×	70	4.0k
Yoon‐Seok Chung South Korea	16	1.1k 1.0×	260 0.4×	392 0.7×	100 0.4×	73 0.3×	69	1.9k
Julu Bhatnagar United States	26	1.5k 1.2×	191 0.3×	665 1.1×	99 0.4×	143 0.6×	59	2.3k
Kwai Peng Chan Singapore	17	1.5k 1.3×	184 0.3×	441 0.7×	97 0.4×	163 0.7×	32	2.4k
John S. Tam Hong Kong	36	1.5k 1.3×	297 0.5×	2.7k 4.5×	301 1.2×	223 0.9×	78	4.3k
Jo Southern United Kingdom	30	1.4k 1.2×	334 0.5×	1.9k 3.2×	90 0.4×	86 0.4×	89	3.4k

Countries citing papers authored by Sami Al-Hajjar

Since Specialization

Citations

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

Fields of papers citing papers by Sami Al-Hajjar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sami Al-Hajjar. 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 Sami Al-Hajjar. The network helps show where Sami Al-Hajjar may publish in the future.

Co-authorship network of co-authors of Sami Al-Hajjar

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Al-Hajjar, Sami, et al.. (2025). Common Tongue Manifestations in Patients with Diabetes and Hypertension. The Open Public Health Journal. 18(1).

Alsuhaibani, Mohammed, et al.. (2025). Bacterial bloodstream infections in a pediatric population: A 7-year experience at a tertiary care center in Saudi Arabia. Infection Disease & Health. 30(4). 290–298.

Aljumaah, Suliman, Mohammed Alsuhaibani, Esam A. Albanyan, et al.. (2025). The effects of postponing BCG vaccination on the risk of BCG-related complications among patients with severe combined immunodeficiency disease in Saudi Arabia. Frontiers in Immunology. 16. 1596963–1596963. 2 indexed citations

Alsuhaibani, Mohammed, et al.. (2024). Evolving Epidemiology of Pediatric Respiratory Syncytial Virus (RSV) Cases Around COVID-19 Pandemic: Impact and Clinical Insights, Retrospective Cohort Study. Journal of Epidemiology and Global Health. 14(2). 319–326. 3 indexed citations

Alsuhaibani, Mohammed, et al.. (2024). Epidemiology, clinical profiles, and antimicrobial susceptibility ofElizabethkingia meningosepticainfections. Saudi Medical Journal. 45(8). 840–847. 2 indexed citations

Alsuhaibani, Mohammed, et al.. (2023). 1682. Clinical Characteristics and Outcome of Acinetobacter Bacteremia in Children. Open Forum Infectious Diseases. 10(Supplement_2). 1 indexed citations

Al-Hajjar, Sami, Wesam Kurdi, Maha Tulbah, et al.. (2022). Observational cohort study of perinatal outcomes of women with COVID-19. Journal of Infection and Public Health. 15(12). 1503–1507. 1 indexed citations

Alsuhaibani, Mohammed, et al.. (2021). Stenotrophomonas maltophilia bacteremia in children: risk factors and mortality rate. Antimicrobial Resistance and Infection Control. 10(1). 19–19. 26 indexed citations

Assiri, Abdullah M., Jaffar A. Al‐Tawfiq, Abdullah A Al-Rabeeah, et al.. (2013). Epidemiological, demographic, and clinical characteristics of 47 cases of Middle East respiratory syndrome coronavirus disease from Saudi Arabia: a descriptive study. The Lancet Infectious Diseases. 13(9). 752–761. 1048 indexed citations breakdown →

10.

Guia, Sophie, Céline Cognet, Ludovic de Beaucoudrey, et al.. (2008). A role for interleukin-12/23 in the maturation of human natural killer and CD56+ T cells in vivo. Blood. 111(10). 5008–5016. 51 indexed citations

11.

Boisson‐Dupuis, Stéphanie, Emmanuelle Jouanguy, Sami Al-Hajjar, et al.. (2003). Impaired response to interferon-α/β and lethal viral disease in human STAT1 deficiency. Nature Genetics. 33(3). 388–391. 578 indexed citations breakdown →

12.

Al-Mazrou, Yagob, et al.. (2003). Disease burden and case management of bacterial meningitis among children under 5 years of age in Saudi Arabia.. PubMed. 24(1). 1300–45. 14 indexed citations

13.

Al-Mohsen, Ibrahim, Deanna A. Sutton, Lynne Sigler, et al.. (2000). Acrophialophora fusisporaBrain Abscess in a Child with Acute Lymphoblastic Leukemia: Review of Cases and Taxonomy. Journal of Clinical Microbiology. 38(12). 4569–4576. 31 indexed citations

14.

Al-Hajjar, Sami, et al.. (1999). Influenza viruses in children attending major referral center in Saudi Arabia.. PubMed. 20(3). 232–5. 2 indexed citations

15.

Al-Hajjar, Sami, et al.. (1998). Respiratory viruses in children attending a major referral centre in Saudi Arabia. Annals of Tropical Paediatrics. 18(2). 87–92. 40 indexed citations

16.

Al-Hajjar, Sami, et al.. (1997). COXIELLA BURNETII ENDOCARDITIS IN A CHILD. The Pediatric Infectious Disease Journal. 16(9). 911–913. 20 indexed citations

17.

Al-Hajjar, Sami, et al.. (1997). Enteroviruses at a Tertiary Care Center in Saudi Arabia, 1989-1995. Annals of Saudi Medicine. 17(1). 16–19. 3 indexed citations

18.

Al-Hajjar, Sami. (1996). Orbitofacial conidiobolomycosis in a child. Medical Entomology and Zoology. 15. 11130–11132. 3 indexed citations

19.

Al-Hajjar, Sami, et al.. (1996). Orbitofascial Conidiobolomycosis in a Child. The Pediatric Infectious Disease Journal. 15(12). 1130–1132. 13 indexed citations

20.

Al-Hajjar, Sami, et al.. (1994). Antimicrobial resistance of bacterial pathogens at two tertiary-care centers, in Riyadh and Texas.. PubMed. 90(11). 59–62. 4 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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