Sam Phiri

5.9k total citations · 1 hit paper
172 papers, 3.7k citations indexed

About

Sam Phiri is a scholar working on Infectious Diseases, General Health Professions and Epidemiology. According to data from OpenAlex, Sam Phiri has authored 172 papers receiving a total of 3.7k indexed citations (citations by other indexed papers that have themselves been cited), including 135 papers in Infectious Diseases, 65 papers in General Health Professions and 52 papers in Epidemiology. Recurrent topics in Sam Phiri's work include HIV/AIDS Research and Interventions (118 papers), Adolescent Sexual and Reproductive Health (61 papers) and HIV Research and Treatment (41 papers). Sam Phiri is often cited by papers focused on HIV/AIDS Research and Interventions (118 papers), Adolescent Sexual and Reproductive Health (61 papers) and HIV Research and Treatment (41 papers). Sam Phiri collaborates with scholars based in United States, Malawi and France. Sam Phiri's co-authors include Hannock Tweya, Mina C. Hosseinipour, Ralf Weigel, Olivia Keiser, Matthias Egger, Wingston Ng’ambi, Caryl Feldacker, Andreas Jahn, Landon Myer and Salem Gugsa and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Sam Phiri

157 papers receiving 3.6k citations

Hit Papers

align trajectories

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.

Retention in care under universal antiretroviral therapy for HIV-infected pregnant and breastfeeding women (‘Option B+’) in Malawi

2014 296 citations Hannock Tweya, Joep J. van Oosterhout et al. AIDS profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Sam Phiri United States	31	3.0k	1.2k	1.1k	1.0k	707	172	3.7k
Kara Wools‐Kaloustian United States	35	3.1k 1.0×	1.3k 1.1×	975 0.9×	935 0.9×	640 0.9×	157	4.0k
Joep J. van Oosterhout Malawi	31	2.4k 0.8×	1.3k 1.0×	951 0.9×	656 0.6×	584 0.8×	111	3.2k
Janet Giddy South Africa	34	3.2k 1.1×	1.6k 1.3×	1.1k 1.0×	1.2k 1.2×	395 0.6×	89	3.7k
Hannock Tweya United States	28	2.1k 0.7×	931 0.8×	1.0k 0.9×	468 0.5×	712 1.0×	137	2.6k
Catherine Orrell South Africa	36	4.4k 1.5×	1.9k 1.5×	1.1k 1.0×	1.9k 1.9×	502 0.7×	159	4.9k
Rashida A. Ferrand United Kingdom	34	2.7k 0.9×	1.4k 1.2×	1.5k 1.4×	574 0.6×	407 0.6×	240	4.0k
Didier Koumavi Ekouévi France	39	3.6k 1.2×	2.0k 1.6×	1.1k 1.0×	1.6k 1.5×	569 0.8×	237	5.1k
Lawrence Long United States	30	2.4k 0.8×	1.2k 1.0×	557 0.5×	846 0.8×	414 0.6×	119	3.0k
Morna Cornell South Africa	27	2.1k 0.7×	1.0k 0.8×	773 0.7×	790 0.8×	408 0.6×	84	2.7k
Chipepo Kankasa Zambia	36	2.8k 0.9×	1.9k 1.5×	892 0.8×	1.1k 1.1×	594 0.8×	142	4.2k

Countries citing papers authored by Sam Phiri

Since Specialization

Citations

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

Fields of papers citing papers by Sam Phiri

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Sam Phiri

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

All Works

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20 of 20 papers shown

Mollan, Katie R., Brian W. Pence, Daniel Westreich, et al.. (2025). Effectiveness of levonorgestrel implant and depot medroxyprogesterone acetate injectable for women with HIV on efavirenz. AIDS. 39(9). 1197–1203.

Phiri, Khumbo, et al.. (2025). Intimate partner violence among HIV index case testing clients in Malawi, a mixed-methods study. PLOS Global Public Health. 5(2). e0003818–e0003818. 1 indexed citations

Phiri, Khumbo, Kelvin Balakasi, Diane Smith, et al.. (2025). Barriers to viral suppression in children aged 9 years or younger on dolutegravir-based antiretroviral therapy in Malawi, a mixed-methods study. PLOS Global Public Health. 5(5). e0004510–e0004510.

Hoffman, Risa M., Khumbo Phiri, Hannah Whitehead, et al.. (2024). Preferences for Hypertension Care in Malawi: A Discrete Choice Experiment Among People Living with Hypertension, With and Without HIV. AIDS and Behavior. 29(1). 246–256.

Balakasi, Kelvin, Khumbo Phiri, Sam Phiri, et al.. (2024). Core components of male-specific person-centred HIV care: a qualitative analysis from client and healthcare worker perspectives in Malawi. SHILAP Revista de lepidopterología. 2(2). e001100–e001100.

Jagger, Pamela, Irving Hoffman, Charles Jumbe, et al.. (2024). Household air pollution exposure and risk of tuberculosis: a case–control study of women in Lilongwe, Malawi. SHILAP Revista de lepidopterología. 2(1). e000176–e000176. 4 indexed citations

Dovel, Kathryn, Kelvin Balakasi, Julie Hubbard, et al.. (2023). Identifying efficient linkage strategies for men (IDEaL): a study protocol for an individually randomised control trial. BMJ Open. 13(7). e070896–e070896. 6 indexed citations

Steffen, Hans‐Michael, Florian Neuhann, Philipp Kasper, et al.. (2023). Blood pressure changes during tenofovir-based antiretroviral therapy among people living with HIV in Lilongwe, Malawi: results from the prospective LighTen Cohort Study. Clinical Research in Cardiology. 112(11). 1650–1663. 5 indexed citations

Phiri, Khumbo, Hannah Whitehead, Corrina Moucheraud, et al.. (2023). Burnout and depression: A cross sectional study among health care workers providing HIV care during the COVID-19 pandemic in Malawi. SHILAP Revista de lepidopterología. 3(9). e0001887–e0001887. 1 indexed citations

10.

Choko, Augustine, Thomas J. Coates, Kelvin Balakasi, et al.. (2023). Engaging men through HIV self-testing with differentiated care to improve ART initiation and viral suppression among men in Malawi (ENGAGE): A study protocol for a randomized control trial. PLoS ONE. 18(2). e0281472–e0281472. 4 indexed citations

11.

Moucheraud, Corrina, Khumbo Phiri, Hannah Whitehead, et al.. (2022). Uptake of the COVID-19 vaccine among healthcare workers in Malawi. International Health. 15(1). 77–84. 29 indexed citations

12.

Ballif, Marie, Nanina Anderegg, Frédérique Chammartin, et al.. (2021). Tracing People Living With Human Immunodeficiency Virus Who Are Lost to Follow-up at Antiretroviral Therapy Programs in Southern Africa: A Sampling-Based Cohort Study in 6 Countries. Clinical Infectious Diseases. 74(2). 171–179. 11 indexed citations

13.

Chen, Jane S., Mitch Matoga, Brian W. Pence, et al.. (2021). A randomized controlled trial evaluating combination detection of HIV in Malawian sexually transmitted infections clinics. Journal of the International AIDS Society. 24(4). e25701–e25701. 8 indexed citations

14.

Herce, Michael E., Maganizo Chagomerana, Lauren C. Zalla, et al.. (2021). Community-facility linkage models and maternal and infant health outcomes in Malawi’s PMTCT/ART program: A cohort study. PLoS Medicine. 18(9). e1003780–e1003780. 2 indexed citations

15.

Thekkur, Pruthu, Hannock Tweya, Sam Phiri, et al.. (2021). Assessing the Impact of COVID-19 on TB and HIV Programme Services in Selected Health Facilities in Lilongwe, Malawi: Operational Research in Real Time. Tropical Medicine and Infectious Disease. 6(2). 81–81. 33 indexed citations

16.

Zaniewski, Elizabeth, Frédérique Chammartin, Nicola Maxwell, et al.. (2020). Trends in CD4 and viral load testing 2005 to 2018: multi‐cohort study of people living with HIV in Southern Africa. Journal of the International AIDS Society. 23(7). e25546–e25546. 28 indexed citations

17.

Tsondai, Priscilla Ruvimbo, Annette H. Sohn, Sam Phiri, et al.. (2020). Characterizing the double‐sided cascade of care for adolescents living with HIV transitioning to adulthood across Southern Africa. Journal of the International AIDS Society. 23(1). e25447–e25447. 14 indexed citations

18.

Ritchie, Lisa M. Puchalski, Monique van Lettow, Ba’ Pham, et al.. (2019). What interventions are effective in improving uptake and retention of HIV-positive pregnant and breastfeeding women and their infants in prevention of mother to child transmission care programmes in low-income and middle-income countries? A systematic review and meta-analysis. BMJ Open. 9(7). e024907–e024907. 23 indexed citations

19.

Tweya, Hannock, Christopher C. Stanley, Salem Gugsa, et al.. (2017). A cross-sectional study to evaluate second line virological failure and elevated bilirubin as a surrogate for adherence to atazanavir/ritonavir in two urban HIV clinics in Lilongwe, Malawi. BMC Infectious Diseases. 17(1). 461–461. 7 indexed citations

20.

Davies, Mary‐Ann, Margaret May, Carolyn Bolton‐Moore, et al.. (2014). Prognosis of Children With HIV-1 Infection Starting Antiretroviral Therapy in Southern Africa. The Pediatric Infectious Disease Journal. 33(6). 608–616. 20 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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