Citation Rankings
Highly Cited Researchers

Medical and Health Sciences / Biostatistics Highly Cited Researchers 19 Scientists Citation in South Africa Rankings - 2025

The Citation Rankings (Highly Cited Researchers) list 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.

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Total 19 scientists, 1 country, 8 institution
* Total Citation Counts Rankings
Ranking Based On Selection: 1
South Africa
Carl Lombard
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,725
9,611
0.285
* Total Citation Counts Rankings
Ranking Based On Selection: 2
South Africa
Tonya Marianne Esterhuizen
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,164
4,331
0.605
* Total Citation Counts Rankings
Ranking Based On Selection: 3
South Africa
Robert Schall
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,693
1,252
0.187
* Total Citation Counts Rankings
Ranking Based On Selection: 4
South Africa
Freedom Gumedze
Mathematical statistics
biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,996
3,938
0.657
* Total Citation Counts Rankings
Ranking Based On Selection: 5
South Africa
Tarylee Reddy
Biostatistics
HIV prevention
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,697
2,203
0.817
* Total Citation Counts Rankings
Ranking Based On Selection: 6
South Africa
Cari Van Schalkwyk
Biostatistics
Infectious disease modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,450
2,161
0.882
* Total Citation Counts Rankings
Ranking Based On Selection: 7
South Africa
Esnat D. Chirwa
Biostatistics
Gender-based violence research
Structural Equation Modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,349
2,048
0.872
* Total Citation Counts Rankings
Ranking Based On Selection: 8
South Africa
Moses Okpeku
Genomics
Quantitative Genetics
Biostatistics
Bioinformatics
Livestock Production and Conservation Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,170
1,633
0.753
* Total Citation Counts Rankings
Ranking Based On Selection: 9
South Africa
Joseph B. Sempa
HIV/AIDS treatment outcomes and HIV immunology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,020
627
0.615

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* Total Citation Counts Rankings
Ranking Based On Selection: 10
South Africa
Roxanne Beauclair
Epidemiology
Applied Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
633
321
0.507
* Total Citation Counts Rankings
Ranking Based On Selection: 11
South Africa
Peter Mphekgwana
Biostatistics
non-communicable disease
statistical modelling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
329
329
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 12
South Africa
Lovemore Nyasha Sigwadhi
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
272
271
0.996
* Total Citation Counts Rankings
Ranking Based On Selection: 13
South Africa
Ashenafi Argaw Yirga
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
158
155
0.981
* Total Citation Counts Rankings
Ranking Based On Selection: 14
South Africa
Jesca Batidzirai
Biostatistics
Survival Analysis
Longitudinal Data Analysis
Health Promotion
Cancer Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
121
88
0.727
* Total Citation Counts Rankings
Ranking Based On Selection: 16
South Africa
Shingirai Brenda Kagodora
Biostatistics
AI
ML
Radiobilogy and Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85
85
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 17
South Africa
Sisa Pazi
Biostatistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
74
74
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 18
South Africa
Onyekachi Esther Nwoko
Biostatistics
Public Health
Climate Change
Neglected Tropical Diseases
Vector-Borne Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42
42
1.000
* Total Citation Counts Rankings
Rankings
19,155
South Africa
52
1
Ranking Based On Selection: 1
Carl Lombard
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,725
9,611
0.285
* Total Citation Counts Rankings
Rankings
145,684
South Africa
580
84
Ranking Based On Selection: 2
Tonya Marianne Esterhuizen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,164
4,331
0.605
* Total Citation Counts Rankings
Rankings
156,413
South Africa
614
12
Ranking Based On Selection: 3
Robert Schall
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,693
1,252
0.187
* Total Citation Counts Rankings
Rankings
174,846
South Africa
706
170
Ranking Based On Selection: 4
Freedom Gumedze
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,996
3,938
0.657
* Total Citation Counts Rankings
Rankings
358,175
South Africa
1,627
24
Ranking Based On Selection: 5
Tarylee Reddy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,697
2,203
0.817
* Total Citation Counts Rankings
Rankings
385,950
South Africa
1,784
234
Ranking Based On Selection: 6
Cari Van Schalkwyk
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,450
2,161
0.882
* Total Citation Counts Rankings
Rankings
398,413
South Africa
1,855
29
Ranking Based On Selection: 7
Esnat D. Chirwa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,349
2,048
0.872
Biostatistics
Gender-based violence research
Structural Equation Modelling
* Total Citation Counts Rankings
Rankings
422,379
South Africa
1,991
180
Ranking Based On Selection: 8
Moses Okpeku
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,170
1,633
0.753
Genomics
Quantitative Genetics
Biostatistics
Bioinformatics
Livestock Production and Conservation Biology
* Total Citation Counts Rankings
Rankings
679,843
South Africa
3,457
89
Ranking Based On Selection: 9
Joseph B. Sempa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,020
627
0.615
* Total Citation Counts Rankings
Rankings
846,164
South Africa
4,493
519
Ranking Based On Selection: 10
Roxanne Beauclair
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
633
321
0.507

360° Institutional Performance & Benchmarking Click Here for Live Demo 

Gain data-driven strategic insights into your institution’s academic performance, global positioning, and competitive strengths through advanced analysis and benchmarking

with 20 similarly ranked institutions at City, Country, Region, and Global levels. 

* Total Citation Counts Rankings
Rankings
1,099,415
South Africa
6,491
67
Ranking Based On Selection: 11
Peter Mphekgwana
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
329
329
1.000
Biostatistics
non-communicable disease
statistical modelling
* Total Citation Counts Rankings
Rankings
1,179,293
South Africa
7,164
778
Ranking Based On Selection: 12
Lovemore Nyasha Sigwadhi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
272
271
0.996
* Total Citation Counts Rankings
Rankings
1,417,198
South Africa
9,287
720
Ranking Based On Selection: 13
Ashenafi Argaw Yirga
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
158
155
0.981
* Total Citation Counts Rankings
Rankings
1,537,218
South Africa
10,353
805
Ranking Based On Selection: 14
Jesca Batidzirai
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
121
88
0.727
Biostatistics
Survival Analysis
Longitudinal Data Analysis
Health Promotion
Cancer Research
* Total Citation Counts Rankings
Rankings
1,566,851
South Africa
10,557
1,027
Ranking Based On Selection: 15
Rutendo Birri Makota|Rutendo Beauty Birri, Rutendo Birri
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
113
84
0.743
* Total Citation Counts Rankings
Rankings
1,684,059
South Africa
11,556
1,112
Ranking Based On Selection: 16
Shingirai Brenda Kagodora
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85
85
1.000
Biostatistics
AI
ML
Radiobilogy and Biochemistry
* Total Citation Counts Rankings
Rankings
1,738,028
South Africa
11,995
176
Ranking Based On Selection: 17
Sisa Pazi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
74
74
1.000
* Total Citation Counts Rankings
Rankings
1,932,975
South Africa
13,803
1,076
Ranking Based On Selection: 18
Onyekachi Esther Nwoko
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42
42
1.000
Biostatistics
Public Health
Climate Change
Neglected Tropical Diseases
Vector-Borne Diseases
* Total Citation Counts Rankings
Rankings
2,077,710
South Africa
15,216
1,435
Ranking Based On Selection: 19
Christoffel Jospeh Brand Muller
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25
16
0.640
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