Anna‐Ursula Happel

Also affiliated with Wellcome Centre for Infectious Diseases Research in Africa

Immunology and MicrobiologyBiochemistry, Genetics and Molecular BiologyMedicineHealth Professions

Pilot corpus only

This score is computed over theSindex pilot corpus and does not cover the full scientific literature. Scores are relative to papers we have ingested — papers, authors, and institutions outside the pilot are not represented. Methodology.

Top 6%percentile

0.304Author DataRank

Indexed papers

1in pilot corpus

datarank_citation_only_1hop_v6· scope data_onlyMethodology

Why this DataRank?

An author's DataRank is the sum of the DataRanks of all 1 indexed paper attributed to them. A prolific author with many moderate-impact papers can outrank one with a single high-impact paper.

Author scores recompute whenever paper DataRanks are refreshed, so this number lags the underlying paper scores by at most one batch run.

Read the full methodology →

The highest-impact dataset this researcher has shared, ranked by DataRank — the single contribution doing the most to lift their data-sharing standing.

Genome Sequences of Anelloviruses, a Genomovirus, Microviruses, Polyomaviruses, and an Unclassified Caudovirus Identified in Vaginal Secretions from South African Adolescents

Microbiology Resource Announcements(2022)10.1128/mra.01143-22

Top 55%

0.304DataRank

Top 55%5 citations

Christina Balle, Bryan Brown, Colin Feng, Enock Havyarimana, Iyaloo N. Konstantinus +7 more

Papers

Driven by 22 papers — median percentile 45. Top paper: “Hormonal contraception alters vaginal microbiota and cytokines in South African adolescents in a randomized trial”.

Hormonal contraception alters vaginal microbiota and cytokines in South African adolescents in a randomized trial

Nature Communications(2020)10.1038/s41467-020-19382-9

N/A

1.6DataRank · unranked

72 citations

Iyaloo N. Konstantinus, Shameem Z. Jaumdally, Enock Havyarimana, Katie Lennard, Rachel Esra +15 more

The Vaginal Virome—Balancing Female Genital Tract Bacteriome, Mucosal Immunity, and Sexual and Reproductive Health Outcomes?

Viruses(2020)10.3390/v12080832

N/A

0.550DataRank · unranked

38 citations

Arvind Varsani, Christina Balle, Jo-Ann Passmore, Heather B. Jaspan, Anna‐Ursula Happel

Persistent, Asymptomatic Colonization with Candida is Associated with Elevated Frequencies of Highly Activated Cervical Th17-Like Cells and Related Cytokines in the Reproductive Tract of South African Adolescents

Microbiology Spectrum(2022)10.1128/spectrum.01626-21

N/A

0.484DataRank · unranked

10 citations

Melanie Gasper, Christina Balle, Iyaloo N. Konstantinus, Hoyam Gamieldien, Smritee Dabee +5 more

Hormonal contraception and risk of STIs and bacterial vaginosis in South African adolescents: secondary analysis of a randomised trial

Sexually Transmitted Infections(2020)10.1136/sextrans-2020-054483

N/A

0.447DataRank · unranked

8 citations

Katherine Gill, Iyaloo N. Konstantinus, Shameem Z. Jaumdally, Katie Lennard, Rachel Esra +11 more

The Effect of Contraception on Genital Cytokines in Women Randomized to Copper Intrauterine Device, Depot Medroxyprogesterone Acetate, or Levonorgestrel Implant

The Journal of Infectious Diseases(2022)10.1093/infdis/jiac084

N/A

0.389DataRank · unranked

8 citations

Rubina Bunjun, Smritee Dabee, Shameem Z. Jaumdally, Maricianah Onono, Gonasagrie Nair +15 more

Genome Sequences of Anelloviruses, a Genomovirus, Microviruses, Polyomaviruses, and an Unclassified Caudovirus Identified in Vaginal Secretions from South African Adolescents

Microbiology Resource Announcements(2022)10.1128/mra.01143-22

Top 55%

0.304DataRank

Top 55%5 citations

Christina Balle, Bryan Brown, Colin Feng, Enock Havyarimana, Iyaloo N. Konstantinus +7 more

Factors influencing maternal microchimerism throughout infancy and its impact on infant T cell immunity

bioRxiv (Cold Spring Harbor Laboratory)(2021)10.1101/2021.03.02.432825

N/A

0.208DataRank · unranked

3 citations

Blair Armistead, Agano Kiravu, Xiaochang Song, Anna‐Ursula Happel, Angela A. Hoffmann +6 more

Bifidobacterium infantis supplementation versus placebo in early life to improve immunity in infants exposed to HIV: a protocol for a randomized trial

BMC Complementary Medicine and Therapies(2023)10.1186/s12906-023-04208-0

N/A

0.186DataRank · unranked

2 citations

Lerato Rametse, Brandon Perumaul, Christian Diener, Sean M. Gibbons, Donald Nyangahu +4 more

Developmental challenges in infants who are HIV-exposed uninfected

Brain Behavior and Immunity(2025)10.1016/j.bbi.2025.106078

N/A

0.104DataRank · unranked

1 citations

Andile Mtshali, Gugulethu Mzobe, Nashlin Pillay, Anna‐Ursula Happel, Sinaye Ngcapu +1 more

An open‐label, randomized crossover study to evaluate the acceptability and preference for contraceptive options in female adolescents, 15 to 19 years of age in Cape Town, as a proxy for HIV prevention methods (UChoose)

Journal of the International AIDS Society(2020)10.1002/jia2.25626

N/A

0DataRank · unranked

48 citations

Anna‐Ursula Happel, Tanya Pidwell, Andrea S. Mendelsohn, Menna Duyver, Leigh F. Johnson +14 more

Relationship between the Oral and Vaginal Microbiota of South African Adolescents with High Prevalence of Bacterial Vaginosis

Microorganisms(2020)10.3390/microorganisms8071004

N/A

0DataRank · unranked

34 citations

Rachel Esra, Enock Havyarimana, Shameem Z. Jaumdally, Katie Lennard, Iyaloo N. Konstantinus +10 more

Systems Analysis Reveals Contraceptive-Induced Alteration of Cervicovaginal Gene Expression in a Randomized Trial

Frontiers in Reproductive Health(2022)10.3389/frph.2022.781687

N/A

0DataRank · unranked

3 citations

Prachi Mehrotra Gupta, Gregory K. Tharp, Sydney A. Nelson, Iyaloo N. Konstantinus, Katie Lennard +9 more

Cervicovaginal Human Papillomavirus Genomes, Microbiota Composition and Cytokine Concentrations in South African Adolescents

Viruses(2023)10.3390/v15030758

N/A

0DataRank · unranked

14 citations

Christina Balle, Enock Havyarimana, Bryan P. Brown, Brandon S. Maust, Colin Feng +7 more

Comparison of Female Genital Tract Cytokine and Microbiota Signatures Induced by Initiation of Intramuscular DMPA and NET-EN Hormonal Contraceptives - a Prospective Cohort Analysis

Frontiers in Immunology(2021)10.3389/fimmu.2021.760504

N/A

0DataRank · unranked

10 citations

Ramla F. Tanko, Bryan P. Brown, Rubina Bunjun, Christina Balle, Colin Feng +13 more

Bifidobacterium infantis associates with T cell immunity in human infants and is sufficient to enhance antigen-specific T cells in mice

Science Advances(2023)10.1126/sciadv.ade1370

N/A

0DataRank · unranked

12 citations

Anna‐Ursula Happel, Jerome Wendoh, Agano Kiravu, Yuli Wang, Colin Feng +14 more

Update on the Impact of Depot Medroxyprogesterone Acetate on Vaginal Mucosal Endpoints and Relevance to Sexually Transmitted Infections

Current HIV/AIDS Reports(2023)10.1007/s11904-023-00662-0

N/A

0DataRank · unranked

6 citations

Christina Balle, Maricianah Onono, Steve Innes, Gonasagrie Nair, Thesla Palanee‐Phillips +7 more

Longitudinal gut microbiota composition of South African and Nigerian infants in relation to tetanus vaccine responses

Research Square(2023)10.21203/rs.3.rs-3112263/v1

N/A

0DataRank · unranked

0 citations

Heather B. Jaspan, Anna‐Ursula Happel, Susan Holmes, Alashʼle Abimiku, Sophia Osawe +3 more

Longitudinal gut microbiota composition of South African and Nigerian infants in relation to tetanus vaccine responses

Microbiology Spectrum(2024)10.1128/spectrum.03190-23

N/A

0DataRank · unranked

2 citations

Sophia Osawe, Anna‐Ursula Happel, Clive M. Gray, Susan Holmes, Jonathan M. Blackburn +3 more

Reduced anti-viral IgG repertoire in HIV-exposed but uninfected infants compared to HIV-unexposed infants

iScience(2024)10.1016/j.isci.2024.110282

N/A

0DataRank · unranked

1 citations

Anna‐Ursula Happel, Berenice Alinde, Clive M. Gray, Heather B. Jaspan, Sonwabile Dzanibe +1 more

Contraceptive effects on the cervicovaginal microbiome: Recent evidence including randomized trials

American Journal of Reproductive Immunology(2023)10.1111/aji.13785

N/A

0DataRank · unranked

12 citations

Anna‐Ursula Happel, Renee Heffron, Heather B. Jaspan, Christina Balle

Factors influencing maternal microchimerism throughout infancy and its impact on infant T cell immunity

Journal of Clinical Investigation(2022)10.1172/jci148826

N/A

0DataRank · unranked

37 citations

Blair Armistead, Agano Kiravu, Xiaochang Song, Anna‐Ursula Happel, Angela A. Hoffmann +6 more

Presence and Persistence of Putative Lytic and Temperate Bacteriophages in Vaginal Metagenomes from South African Adolescents

Viruses(2021)10.3390/v13122341

N/A

0DataRank · unranked

24 citations

Christina Balle, Brandon S. Maust, Iyaloo N. Konstantinus, Katherine Gill, Linda‐Gail Bekker +6 more

Anna‐Ursula Happel

Indexed papers

Top data-sharing exemplar

Papers