Willy K Urassa

5.2k citations

98 papers · 3.9k · 2 hit papers · h-index 33

Impact in

Virology top 1%
- HIV Research and Treatment
Applied Microbiology and Biotechnology top 2%

Papers in

Virology 23
- HIV Research and Treatment 23
Infectious Diseases 21
- HIV/AIDS Research and Interventions 13
- HIV/AIDS drug development and treatment 5

Co-authors: Wafaie Wahib Fawzi (39 shared papers)Eduardo Villamor (14 shared papers)Fred S. Mhalu (25 shared papers)Ferdinand M Mugusi (10 shared papers)Gunnel Biberfeld (21 shared papers)Nina Langeland (7 shared papers)Ronald J. Bosch (9 shared papers)Donna L. Spiegelman (12 shared papers)
Journals: BMC Infectious Diseases (7 papers)JAIDS Journal of Acquired Immune Deficiency Syndromes (6 papers)Journal of Nutrition (5 papers)PLoS ONE (5 papers)European Journal of Clinical Nutrition (3 papers)
Partner nations: Tanzania United States Sweden

In The Last Decade

Willy K Urassa

97 papers receiving 3.7k citations

Willy K Urassa's Hit Papers

align trajectories log scale

Small babies, big risks: global estimates of prevalence and mortality for vulnerable newborns to accelerate change and improve counting 2023 · 204 citations

What are hit papers?

Paper score: A paper's citations measured against the top-1% bar of its own field and year: the square root of citations ÷ bar, so 1 means right at the bar and 2 means four times its citations. The bar blends the citation counts that enter the top 1% of the paper's subfields in its year (weighted 89.5%), of those subfields over all years (0.5%) and of its year across all fields (10%); a subfield and year with fewer than 400 papers takes its year's bar. Papers from 2026 are not scored yet: in an unfinished year, when a paper appeared matters more than how it is cited.

Hit paper: A paper cited at least 1.5× the top-1% bar of its field and year: a paper score of at least √1.5.

2023 The Lancet
2018 The Lancet Infectious Diseases

Peers

Countries citing papers authored by Willy K Urassa

Since Specialization

Citations

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

Fields of papers citing papers by Willy K Urassa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Willy K Urassa. 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 Willy K Urassa. The network helps show where Willy K Urassa may publish in the future.

Co-authors

The 25 scholars most cited alongside Willy K Urassa, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Willy K Urassa Line = papers co-authored together Willy K Urassa links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 98 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Global and regional molecular epidemiology of HIV-1, 1990–2015: a systematic review, global survey, and trend analysis The Lancet Infectious Diseases ·Joris Hemelaar, Ramyiadarsini I. Elangovan, Jason Yun, Leslie Dickson-Tetteh, Isabella Fleminger, Shona Kirtley, Brian Gerard Williams, Eleanor Gouws-Williams Hit paper breakdown →	2018	315
2	Modifiers of the effect of maternal multiple micronutrient supplementation on stillbirth, birth outcomes, and infant mortality: a meta-analysis of individual patient data from 17 randomised trials in low-income and middle-income countries The Lancet Global Health ·Emily Rose Smith, Anuraj H. Shankar, Lee S. F. Wu, Said Aboud, Seth Adu‐Afarwuah, Hasmot Ali, Rina Samsiyah Agustina, Shams El Arifeen	2017	206
3	Small babies, big risks: global estimates of prevalence and mortality for vulnerable newborns to accelerate change and improve counting The Lancet ·Joy Elizabeth Lawn, Lorena Suárez Idueta, Elizabeth Hazel, Daniel J. Erchick, Judith Yargawa, Joanne Katz, Anne CC Lee, Mike Diaz Hit paper breakdown →	2023	204
4	High Rate of Fatal Cases of Pediatric Septicemia Caused by Gram-Negative Bacteria with Extended-Spectrum Beta-Lactamases in Dar es Salaam, Tanzania Journal of Clinical Microbiology ·Bjørn Blomberg, Roland Jureen, Karim Premji Manji, Bushir S. Tamim, Davis Mwakagile, Willy K Urassa, Maulidi Rashidi Fataki, Viola Msangi	2005	185
5	Antimicrobial resistance predicts death in Tanzanian children with bloodstream infections: a prospective cohort study BMC Infectious Diseases ·Bjørn Blomberg, Karim Premji Manji, Willy K Urassa, Bushir S. Tamim, Davis Mwakagile, Roland Jureen, Viola Msangi, Marit Gjerde Tellevik	2007	180
6	Laboratory evaluation of four HIV/syphilis rapid diagnostic tests BMC Infectious Diseases ·Annelies Van Den Heuvel, Hilde R. De Smet, Irena Prat, Anita Sands, Willy K Urassa, Katrien Fransen, Tania Crucitti	2019	177
7	Reliability of HIV rapid diagnostic tests for self-testing compared with testing by health-care workers: a systematic review and meta-analysis The Lancet HIV ·Carmen Figueroa, Cheryl Johnson, Nathan P. Ford, Anita Sands, Shona Dalal, Robyn Meurant, Irena Prat, Karin Hatzold	2018	170
8	Vitamins and Perinatal Outcomes among HIV-Negative Women in Tanzania New England Journal of Medicine ·Wafaie Wahib Fawzi, Willy K Urassa, Ellen Hertzmark, Paul Petraro, Walter Churchill Willett, Donna L. Spiegelman +1 other	2007	143
9	Iron Deficiency and Anemia Predict Mortality in Patients with Tuberculosis3 Journal of Nutrition ·Sheila Isanaka, Ferdinand M Mugusi, Willy K Urassa, Walter Churchill Willett, Ronald J. Bosch, Eduardo Villamor, Donna L. Spiegelman, Christopher Duggan	2011	121
10	A Trial of the Effect of Micronutrient Supplementation on Treatment Outcome, T Cell Counts, Morbidity, and Mortality in Adults with Pulmonary Tuberculosis The Journal of Infectious Diseases ·Eduardo Villamor, Ferdinand M Mugusi, Willy K Urassa, Ronald J. Bosch, Elmar Saathoff, Kenji Matsumoto, Simin Nikbin Meydani, Wafaie Wahib Fawzi	2008	97
11	Evaluation of simple rapid HIV assays and development of national rapid HIV test algorithms in Dar es Salaam, Tanzania BMC Infectious Diseases ·Eligius Lyamuya, Said Aboud, Willy K Urassa, Sufi Jaffer, Judica Mbwana, Faustin Ndugulile, Charles G. Massambu	2009	90
12	Extended Spectrum β-Lactamases among Gram-negative bacteria of nosocomial origin from an Intensive Care Unit of a tertiary health facility in Tanzania BMC Infectious Diseases ·Faustine Ndugulile, Roland Jureen, Stig Harthug, Willy K Urassa, Nina Langeland	2005	85
13	Wasting and body composition of adults with pulmonary tuberculosis in relation to HIV-1 coinfection, socioeconomic status, and severity of tuberculosis European Journal of Clinical Nutrition ·Eduardo Villamor, Elmar Saathoff, Ferdinand M Mugusi, Ronald J. Bosch, Willy K Urassa, Wafaie Wahib Fawzi	2005	70
14	Global and regional epidemiology of HIV-1 recombinants in 1990–2015: a systematic review and global survey The Lancet HIV ·Joris Hemelaar, Ramyiadarsini I. Elangovan, Jason Yun, Leslie Dickson-Tetteh, Shona Kirtley, Eleanor Gouws-Williams, Peter Denis Ghys, Alash’le Abimiku	2020	69
15	Trends in obesity, underweight, and wasting among women attending prenatal clinics in urban Tanzania, 1995–2004 American Journal of Clinical Nutrition ·Eduardo Villamor, Gernard Msamanga, Willy K Urassa, Paul Petraro, Donna L. Spiegelman, David John Hunter, Wafaie Wahib Fawzi	2006	63
16	Optimal Blood Mononuclear Cell Isolation Procedures for Gamma Interferon Enzyme-Linked Immunospot Testing of Healthy Swedish and Tanzanian Subjects Clinical and Vaccine Immunology ·Charlotta Nilsson, Said Aboud, K. Karlén, Bo Hejdeman, Willy K Urassa, Gunnel Biberfeld	2008	63
17	Maternal dietary diversity and dietary quality scores in relation to adverse birth outcomes in Tanzanian women American Journal of Clinical Nutrition ·Isabel Madzorera, Sheila Isanaka, Molin Wang, Gernard Msamanga, Willy K Urassa, Ellen Hertzmark, Christopher Duggan, Wafaie Wahib Fawzi	2020	63
18	Monitoring of HIV-1 Infection Prevalence and Trends in the General Population Using Pregnant Women as a Sentinel Population: 9 Years Experience From the Kagera Region of Tanzania JAIDS Journal of Acquired Immune Deficiency Syndromes ·Gideon Kwesigabo, Japhet Killewo, Willy K Urassa, Ephraim Mbena, Fred S. Mhalu, J. L. P. Lugalla, C. Godoy, Gunnel Biberfeld	2000	56
19	Surveillance of antimicrobial resistance at a tertiary hospital in Tanzania BMC Public Health ·Bjørn Blomberg, Davis Mwakagile, Willy K Urassa, Samwel Y Maselle, M Mashurano, Asbjørn Digranes, Stig Harthug, Nina Langeland	2004	52
20	Factors associated with mortality in HIV-infected and uninfected patients with pulmonary tuberculosis BMC Public Health ·Ferdinand M Mugusi, Saurabh Mehta, Eduardo Villamor, Willy K Urassa, Elmar Saathoff, Ronald J. Bosch, Wafaie Wahib Fawzi	2009	49

About Willy K Urassa

Willy K Urassa is a scholar working on Virology, Infectious Diseases, Nutrition and Dietetics, Obstetrics and Gynecology and Emergency Medicine, having authored 98 papers that have together received 3.9k indexed citations. Recurring topics across this work include HIV Research and Treatment (23 papers), HIV/AIDS Research and Interventions (13 papers), Adolescent Sexual and Reproductive Health (7 papers), Viral-associated cancers and disorders (7 papers), HIV-related health complications and treatments (7 papers), Child Nutrition and Water Access (6 papers), HIV/AIDS drug development and treatment (5 papers) and Antibiotic Resistance in Bacteria (5 papers). The work is most often cited by research in Virology (568 citations), Applied Microbiology and Biotechnology (129 citations), Infectious Diseases (1.2k citations), Molecular Medicine (316 citations) and Obstetrics and Gynecology (206 citations). Willy K Urassa has collaborated with scholars based in Tanzania, United States and Sweden. Frequent co-authors include Wafaie Wahib Fawzi, Eduardo Villamor, Fred S. Mhalu, Ferdinand M Mugusi, Gunnel Biberfeld, Nina Langeland, Ronald J. Bosch, Donna L. Spiegelman, Gernard Msamanga and Roland Jureen. Their work appears in journals such as BMC Infectious Diseases, JAIDS Journal of Acquired Immune Deficiency Syndromes, Journal of Nutrition, PLoS ONE and European Journal of Clinical Nutrition.

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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Willy K Urassa's Hit Papers

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