Citation Rankings
Highly Cited Researchers
Africa Highly Cited Researchers CitationMedical and Health Sciences / Internal Medicine Rankings 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection :1
internal medicine
medical education
clinical epidemiology and biostatistics
health systems management
knowledge translation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,664
11,231
0.263
* Total Citation Counts Rankings
Ranking Based On Selection :2
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,538
33,570
0.972
* Total Citation Counts Rankings
Ranking Based On Selection :3
Medical Microbiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,643
9,078
0.780
* Total Citation Counts Rankings
Ranking Based On Selection :4
Internal Medicine
HIV
Tuberculosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,619
3,171
0.330
* Total Citation Counts Rankings
Ranking Based On Selection :5
médecine
rhumatologie
pédagogie médicale
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,948
4,203
0.470
* Total Citation Counts Rankings
Ranking Based On Selection :6
Infectious Diseases
Toxicology
snake bite envenomination
vaccines
immunology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,350
4,714
0.742
* Total Citation Counts Rankings
Ranking Based On Selection :7
Health
Internal Medicine
Haematology
Sickle cell Disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,186
3,815
0.617
* Total Citation Counts Rankings
Ranking Based On Selection :8
Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,561
2,026
0.364
* Total Citation Counts Rankings
Ranking Based On Selection :9
Diabetes
Clinical Epidemiology
Hypertension
Cardiovascular disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,750
2,828
0.595
* Total Citation Counts Rankings
Ranking Based On Selection :10
General internal medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,565
593
0.130
* Total Citation Counts Rankings
Ranking Based On Selection :11
Diabetes
Lipidology & Immunology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,355
2,316
0.532
* Total Citation Counts Rankings
Ranking Based On Selection :12
Internal Medicine
Massive splenomegaly
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,272
1,613
0.378
* Total Citation Counts Rankings
Ranking Based On Selection :13
Médecine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,129
1,316
0.319
* Total Citation Counts Rankings
Ranking Based On Selection :14
Rheumatology
Immunology
Muscloskeletal Ultrasound
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,868
3,825
0.989
* Total Citation Counts Rankings
Ranking Based On Selection :15
Internal Medicine/Infectious Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,282
1,753
0.534
* Total Citation Counts Rankings
Ranking Based On Selection :16
Internal medicine
Cardiovascular diseases
Clinical epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,430
3,260
0.950
* Total Citation Counts Rankings
Ranking Based On Selection :17
Internal Medicine
Chest Medicine
Health Informatics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,090
1,730
0.560
* Total Citation Counts Rankings
Ranking Based On Selection :18
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,500
1,836
0.734
* Total Citation Counts Rankings
Ranking Based On Selection :19
Hepatology and Medical education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,368
2,080
0.878
* Total Citation Counts Rankings
Ranking Based On Selection :20
Relationship between academic centers Healthcare care systems for under-served population
Internal medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,161
377
0.174
* Total Citation Counts Rankings
Ranking Based On Selection :21
internal medicine
gastroentrology & hepatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,112
1,714
0.812
* Total Citation Counts Rankings
Ranking Based On Selection :22
General Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,878
1,491
0.794
* Total Citation Counts Rankings
Ranking Based On Selection :23
HIV/AIDS/Antiretroviral therapy
Opportunistic Infections
Community-acquired Pneumonia
Sepsis Syndromes and Malaria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,818
1,537
0.845
* Total Citation Counts Rankings
Ranking Based On Selection :24
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,738
500
0.288
* Total Citation Counts Rankings
Ranking Based On Selection :25
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,427
687
0.481
* Total Citation Counts Rankings
Rankings
12,928
2
1
Ranking Based On Selection: 1
Nelson Sewankambo
Makerere University
Kampala, Uganda
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,664
11,231
0.263
internal medicine
medical education
clinical epidemiology and biostatistics
health systems management
knowledge translation
* Total Citation Counts Rankings
Rankings
18,073
29
3
Ranking Based On Selection: 2
Joseph Adel Mattar Banoub
Alexandria University
Alexandria, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,538
33,570
0.972
* Total Citation Counts Rankings
Rankings
82,740
291
61
Ranking Based On Selection: 3
AJ Brink
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,643
9,078
0.780
* Total Citation Counts Rankings
Rankings
103,474
12
3
Ranking Based On Selection: 4
Ferdinand Mugusi
Muhimbili University of Health and Allied Sciences
Dar es salaam, Tanzania
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,619
3,171
0.330
Internal Medicine
HIV
Tuberculosis
* Total Citation Counts Rankings
Rankings
112,337
28
1
Ranking Based On Selection: 5
Najia Hajjaj Hassouni
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,948
4,203
0.470
médecine
rhumatologie
pédagogie médicale
* Total Citation Counts Rankings
Rankings
162,683
221
3
Ranking Based On Selection: 6
Abdulrazaq G. Habib
Bayero University
Gwarzo Road Kano, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,350
4,714
0.742
Infectious Diseases
Toxicology
snake bite envenomination
vaccines
immunology
* Total Citation Counts Rankings
Rankings
167,128
28
8
Ranking Based On Selection: 7
Julie Makani
Muhimbili University of Health and Allied Sciences
Dar es salaam, Tanzania
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,186
3,815
0.617
Health
Internal Medicine
Haematology
Sickle cell Disease
* Total Citation Counts Rankings
Rankings
185,735
83
5
Ranking Based On Selection: 8
S Kimaiyo|S Kimaiyo, Kimaiyo S
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,561
2,026
0.364
* Total Citation Counts Rankings
Rankings
216,433
930
82
Ranking Based On Selection: 9
Paul Rheeder
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,750
2,828
0.595
Diabetes
Clinical Epidemiology
Hypertension
Cardiovascular disease
* Total Citation Counts Rankings
Rankings
224,596
518
23
Ranking Based On Selection: 10
Muhamed A Mamdouh
Beni Suef University
Beni-Suef, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,565
593
0.130
General internal medicine
* Total Citation Counts Rankings
Rankings
234,639
556
31
Ranking Based On Selection: 11
Samir Assaad Khalil
Alexandria University
Alexandria, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,355
2,316
0.532
Diabetes
Lipidology & Immunology
* Total Citation Counts Rankings
Rankings
238,863
101
24
Ranking Based On Selection: 12
George Bedu-Addo
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,272
1,613
0.378
Internal Medicine
Massive splenomegaly
* Total Citation Counts Rankings
Rankings
246,508
90
24
Ranking Based On Selection: 13
Mohamed Yahyaoui
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,129
1,316
0.319
* Total Citation Counts Rankings
Rankings
261,356
662
62
Ranking Based On Selection: 14
Samar Tharwat
Mansoura University
Mansoura, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,868
3,825
0.989
Rheumatology
Immunology
Muscloskeletal Ultrasound
* Total Citation Counts Rankings
Rankings
301,154
44
3
Ranking Based On Selection: 15
Nakanjako Damalie
Infectious Diseases Institute
Peshawar, Uganda
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,282
1,753
0.534
Internal Medicine/Infectious Diseases
* Total Citation Counts Rankings
Rankings
289,880
16
6
Ranking Based On Selection: 16
Julius Mwita
University of Botswana
Gaborone, Botswana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,430
3,260
0.950
Internal medicine
Cardiovascular diseases
Clinical epidemiology
* Total Citation Counts Rankings
Rankings
316,602
193
12
Ranking Based On Selection: 17
Lameck Diero
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,090
1,730
0.560
Internal Medicine
Chest Medicine
Health Informatics
* Total Citation Counts Rankings
Rankings
375,354
12
11
Ranking Based On Selection: 18
Jane Mallewa
University of Malawi
Zomba, Malawi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,500
1,836
0.734
* Total Citation Counts Rankings
Rankings
391,182
207
24
Ranking Based On Selection: 19
Yaw Asante Awuku
University of Cape Coast
Cape Coast, Ghana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,368
2,080
0.878
Hepatology and Medical education
* Total Citation Counts Rankings
Rankings
418,627
284
18
Ranking Based On Selection: 20
Joseph Mamlin
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,161
377
0.174
Relationship between academic centers Healthcare care systems for under-served population
Internal medicine
* Total Citation Counts Rankings
Rankings
425,740
1,499
134
Ranking Based On Selection: 21
Magdy Hamed
Mansoura University
Mansoura, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,112
1,714
0.812
internal medicine
gastroentrology & hepatology
* Total Citation Counts Rankings
Rankings
463,042
2,261
287
Ranking Based On Selection: 22
Neshaad Schrueder
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,878
1,491
0.794
General Internal Medicine
* Total Citation Counts Rankings
Rankings
473,457
1,221
106
Ranking Based On Selection: 23
Michael O. Iroezindu
University of Nigeria
Nsukka, Nigeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,818
1,537
0.845
HIV/AIDS/Antiretroviral therapy
Opportunistic Infections
Community-acquired Pneumonia
Sepsis Syndromes and Malaria
* Total Citation Counts Rankings
Rankings
488,392
2,386
423
Ranking Based On Selection: 24
Heidi Smuts
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,738
500
0.288
* Total Citation Counts Rankings
Rankings
555,226
497
25
Ranking Based On Selection: 25
Abraham Siika
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,427
687
0.481