Clarissa Simas

2.4k total citations · 3 hit papers
17 papers, 1.4k citations indexed

About

Clarissa Simas is a scholar working on Health, Infectious Diseases and Epidemiology. According to data from OpenAlex, Clarissa Simas has authored 17 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Health, 5 papers in Infectious Diseases and 5 papers in Epidemiology. Recurrent topics in Clarissa Simas's work include Vaccine Coverage and Hesitancy (16 papers), SARS-CoV-2 and COVID-19 Research (3 papers) and Influenza Virus Research Studies (3 papers). Clarissa Simas is often cited by papers focused on Vaccine Coverage and Hesitancy (16 papers), SARS-CoV-2 and COVID-19 Research (3 papers) and Influenza Virus Research Studies (3 papers). Clarissa Simas collaborates with scholars based in United Kingdom, United States and Belgium. Clarissa Simas's co-authors include Heidi J. Larson, Emilie Karafillakis, Alexandre de Figueiredo, Pauline Paterson, Ed Pertwee, Judit Takács, Lucia Pastore Celentano, Caitlin Jarrett, Pierre Verger and Patrick Peretti‐Watel and has published in prestigious journals such as The Lancet, Nature Medicine and Nature Reviews Disease Primers.

In The Last Decade

Clarissa Simas

17 papers receiving 1.4k citations

Hit Papers

align trajectories sort by overperformance

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.

Mapping global trends in vaccine confidence and investigating barriers to vaccine uptake: a large-scale retrospective temporal modelling study

2020 694 citations Alexandre de Figueiredo, Clarissa Simas et al. The Lancet profile →
HPV vaccination in a context of public mistrust and uncertainty: a systematic literature review of determinants of HPV vaccine hesitancy in Europe

2019 216 citations Emilie Karafillakis, Clarissa Simas et al. Human Vaccines & Immunotherapeutics profile →
An epidemic of uncertainty: rumors, conspiracy theories and vaccine hesitancy

2022 213 citations Ed Pertwee, Clarissa Simas et al. Nature Medicine profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Clarissa Simas	1.2k	511	471	407	233	17	1.4k
Paul Bramadat	1.4k 1.2×	577 1.1×	707 1.5×	393 1.0×	232 1.0×	20	1.7k
Matthew Z. Dudley	1.2k 1.1×	681 1.3×	401 0.9×	527 1.3×	225 1.0×	48	1.7k
Dorothee Heinemeier	915 0.8×	387 0.8×	409 0.9×	232 0.6×	191 0.8×	10	1.1k
W Schulz	1.6k 1.4×	779 1.5×	559 1.2×	612 1.5×	256 1.1×	8	1.8k
Lisa Fressard	1.2k 1.0×	679 1.3×	349 0.7×	568 1.4×	231 1.0×	54	1.6k
Cindy Holtmann	968 0.8×	382 0.7×	431 0.9×	210 0.5×	231 1.0×	3	1.1k
Dominique Gagnon	1.6k 1.4×	699 1.4×	503 1.1×	593 1.5×	226 1.0×	59	1.9k
Maryline Vivion	918 0.8×	355 0.7×	381 0.8×	338 0.8×	95 0.4×	21	1.1k
Susan M. Sherman	693 0.6×	340 0.7×	235 0.5×	419 1.0×	208 0.9×	56	1.2k
Rize Jing	1.1k 0.9×	700 1.4×	325 0.7×	151 0.4×	426 1.8×	33	1.5k

Countries citing papers authored by Clarissa Simas

Since Specialization

Citations

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

Fields of papers citing papers by Clarissa Simas

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Clarissa Simas

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

All Works

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17 of 17 papers shown

Paterson, Pauline, Clarissa Simas, & Heidi J. Larson. (2023). Coverage and Acceptance of Maternal Vaccines. The Global Library of Women s Medicine. 1 indexed citations

Heyerdahl, Leonardo W, Carla Van Riet, Clarissa Simas, et al.. (2022). Strategic silences, eroded trust: The impact of divergent COVID-19 vaccine sentiments on healthcare workers' relations with peers and patients. Vaccine. 41(4). 883–891. 9 indexed citations

Pertwee, Ed, Clarissa Simas, & Heidi J. Larson. (2022). An epidemic of uncertainty: rumors, conspiracy theories and vaccine hesitancy. Nature Medicine. 28(3). 456–459. 213 indexed citations breakdown →

Figueiredo, Alexandre de, Clarissa Simas, & Heidi J. Larson. (2022). COVID-19 vaccine acceptance and its socio-demographic and emotional determinants: A multi-country cross-sectional study. Vaccine. 41(2). 354–364. 29 indexed citations

Simas, Clarissa, Heidi J. Larson, & Pauline Paterson. (2021). ‘‘Those who do not vaccinate don’t love themselves, or anyone else’’: a qualitative study of views and attitudes of urban pregnant women towards maternal immunisation in Panama. BMJ Open. 11(8). e044903–e044903. 5 indexed citations

Simas, Clarissa, Pauline Paterson, Shelley Lees, & Heidi J. Larson. (2021). “From my phone, I could rule the world”: Critical engagement with maternal vaccine information, vaccine confidence builders and post-Zika outbreak rumours in Brazil. Vaccine. 39(33). 4700–4704. 3 indexed citations

Simas, Clarissa, Heidi J. Larson, & Pauline Paterson. (2021). “Saint Google, now we have information!”: a qualitative study on narratives of trust and attitudes towards maternal vaccination in Mexico City and Toluca. BMC Public Health. 21(1). 1170–1170. 11 indexed citations

Simas, Clarissa & Heidi J. Larson. (2021). Overcoming vaccine hesitancy in low-income and middle-income regions. Nature Reviews Disease Primers. 7(1). 41–41. 52 indexed citations

Heyerdahl, Leonardo W, Carla Van Riet, Clarissa Simas, et al.. (2021). Doubt at the core: Unspoken vaccine hesitancy among healthcare workers. The Lancet Regional Health - Europe. 12. 100289–100289. 43 indexed citations

10.

Larson, Heidi J., et al.. (2021). Vaccine safety in the next decade: why we need new modes of trust building. BMJ Global Health. 6(Suppl 2). e003908–e003908. 14 indexed citations

11.

Karafillakis, Emilie, Sam Martin, Clarissa Simas, et al.. (2020). Methods for Social Media Monitoring Related to Vaccination: Systematic Scoping Review. JMIR Public Health and Surveillance. 7(2). e17149–e17149. 42 indexed citations

12.

Figueiredo, Alexandre de, Clarissa Simas, Emilie Karafillakis, Pauline Paterson, & Heidi J. Larson. (2020). Mapping global trends in vaccine confidence and investigating barriers to vaccine uptake: a large-scale retrospective temporal modelling study. The Lancet. 396(10255). 898–908. 694 indexed citations breakdown →

13.

Larson, Heidi J., Clarissa Simas, & Richard Horton. (2020). The emotional determinants of health: The Lancet–London School of Hygiene & Tropical Medicine Commission. The Lancet. 395(10226). 768–769. 14 indexed citations

14.

Vorsters, Alex, F. Xavier Bosch, Paolo Bonanni, et al.. (2020). Prevention and control of HPV infection and HPV-related cancers in Colombia- a meeting report. BMC Proceedings. 14(S9). 16 indexed citations

15.

Simas, Clarissa, Loveday Penn‐Kekana, Hannah Kuper, et al.. (2020). Hope and trust in times of Zika: the views of caregivers and healthcare workers at the forefront of the epidemic in Brazil. Health Policy and Planning. 35(8). 953–961. 15 indexed citations

16.

Karafillakis, Emilie, Clarissa Simas, Caitlin Jarrett, et al.. (2019). HPV vaccination in a context of public mistrust and uncertainty: a systematic literature review of determinants of HPV vaccine hesitancy in Europe. Human Vaccines & Immunotherapeutics. 15(7-8). 1615–1627. 216 indexed citations breakdown →

17.

Simas, Clarissa, Núbia Muñóz, Leonardo Arregocés, & Heidi J. Larson. (2018). HPV vaccine confidence and cases of mass psychogenic illness following immunization in Carmen de Bolivar, Colombia. Human Vaccines & Immunotherapeutics. 15(1). 163–166. 45 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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