Nicholas C. Grassly

16.8k total citations · 2 hit papers
124 papers, 5.6k citations indexed

About

Nicholas C. Grassly is a scholar working on Infectious Diseases, Cardiology and Cardiovascular Medicine and Epidemiology. According to data from OpenAlex, Nicholas C. Grassly has authored 124 papers receiving a total of 5.6k indexed citations (citations by other indexed papers that have themselves been cited), including 86 papers in Infectious Diseases, 60 papers in Cardiology and Cardiovascular Medicine and 36 papers in Epidemiology. Recurrent topics in Nicholas C. Grassly's work include Viral gastroenteritis research and epidemiology (66 papers), Viral Infections and Immunology Research (60 papers) and SARS-CoV-2 and COVID-19 Research (23 papers). Nicholas C. Grassly is often cited by papers focused on Viral gastroenteritis research and epidemiology (66 papers), Viral Infections and Immunology Research (60 papers) and SARS-CoV-2 and COVID-19 Research (23 papers). Nicholas C. Grassly collaborates with scholars based in United Kingdom, United States and Switzerland. Nicholas C. Grassly's co-authors include Christophe Fraser, Edward P K Parker, Margarita Pons-Salort, R. Bruce Aylward, Edward C. Holmes, Roland W. Sutter, Thomas R. Hird, Geoffrey P. Garnett, Jacob John and Gagandeep Kang and has published in prestigious journals such as Nature, Science and New England Journal of Medicine.

In The Last Decade

Nicholas C. Grassly

119 papers receiving 5.3k 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.

Mathematical models of infectious disease transmission

2008 457 citations Nicholas C. Grassly et al. profile →
Estimating the effects of non-pharmaceutical interventions on COVID-19 in Europe

2020 307 citations Nicholas C. Grassly, Christl A. Donnelly et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Nicholas C. Grassly United Kingdom	42	2.8k	1.7k	1.3k	857	625	124	5.6k
Peter Teunis Netherlands	49	3.6k 1.3×	490 0.3×	1.5k 1.2×	829 1.0×	489 0.8×	165	8.1k
Hitoshi Oshitani Japan	37	1.9k 0.7×	717 0.4×	2.0k 1.5×	687 0.8×	362 0.6×	179	4.5k
Walter A. Orenstein United States	58	3.8k 1.4×	699 0.4×	6.8k 5.2×	910 1.1×	819 1.3×	305	12.4k
Dominic E. Dwyer Australia	48	4.0k 1.4×	359 0.2×	4.1k 3.1×	876 1.0×	1.0k 1.6×	309	9.6k
Peter Horby United Kingdom	40	2.6k 0.9×	294 0.2×	2.5k 1.9×	826 1.0×	1.6k 2.5×	184	6.3k
Roland W. Sutter United States	49	5.0k 1.8×	4.7k 2.8×	2.0k 1.5×	189 0.2×	311 0.5×	186	7.5k
Piet Maes Belgium	41	5.1k 1.8×	1.0k 0.6×	1.7k 1.3×	199 0.2×	555 0.9×	190	7.5k
Richard Pebody United Kingdom	54	3.0k 1.0×	399 0.2×	6.9k 5.3×	1.4k 1.6×	736 1.2×	297	10.0k
Nobuhiko Okabe Japan	31	1.8k 0.6×	556 0.3×	1.6k 1.2×	204 0.2×	399 0.6×	180	3.3k
Natasha S. Crowcroft Canada	43	2.8k 1.0×	384 0.2×	4.8k 3.6×	603 0.7×	763 1.2×	262	8.2k

Countries citing papers authored by Nicholas C. Grassly

Since Specialization

Citations

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

Fields of papers citing papers by Nicholas C. Grassly

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nicholas C. Grassly. 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 Nicholas C. Grassly. The network helps show where Nicholas C. Grassly may publish in the future.

Co-authorship network of co-authors of Nicholas C. Grassly

This figure shows the co-authorship network connecting the top 25 collaborators of Nicholas C. Grassly. A scholar is included among the top collaborators of Nicholas C. Grassly 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 Nicholas C. Grassly. Nicholas C. Grassly 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

Voysey, Merryn, et al.. (2025). A novel approach for estimating vaccine efficacy for infections with multiple outcomes: application to a COVID-19 vaccine trial. 1(3).

Owusu, Michael, Michael Owusu-Ansah, Jonathan Rigby, et al.. (2025). Evaluation of Moore and grab sampling method for Salmonella Typhi detection in environmental samples in Ghana. PLoS ONE. 20(2). e0318840–e0318840.

Abraham, Dilip, Kristen Aiemjoy, Richelle C. Charles, et al.. (2025). Wastewater surveillance for Salmonella Typhi and its association with seroincidence of enteric fever in Vellore, India. PLoS neglected tropical diseases. 19(3). e0012373–e0012373. 1 indexed citations

O’Toole, Áine, Rachel Colquhoun, Daniel Maloney, et al.. (2024). Automated detection and classification of polioviruses from nanopore sequencing reads using piranha. Virus Evolution. 10(1). veae023–veae023. 2 indexed citations

Emary, Katherine R. W., Daniel J. Phillips, Jodie Hay, et al.. (2024). Implementation and adherence to regular asymptomatic testing in a COVID-19 vaccine trial. Vaccine. 42(21). 126167–126167. 1 indexed citations

Bujáki, Erika, Alex Shaw, Adnan Khurshid, et al.. (2023). Comparison of Eleven RNA Extraction Methods for Poliovirus Direct Molecular Detection in Stool Samples. Microbiology Spectrum. 11(2). e0425222–e0425222. 6 indexed citations

Abraham, Dilip, Jonathan Rigby, Satheesh Nair, et al.. (2023). Environmental Surveillance for Salmonella Typhi and its Association With Typhoid Fever Incidence in India and Malawi. The Journal of Infectious Diseases. 229(4). 979–987. 16 indexed citations

Gray, Elizabeth, Laura Cooper, Ananda S Bandyopadhyay, Isobel M. Blake, & Nicholas C. Grassly. (2023). The Origins and Risk Factors for Serotype-2 Vaccine-Derived Poliovirus Emergences in Africa During 2016–2019. The Journal of Infectious Diseases. 228(1). 80–88. 7 indexed citations

Pons-Salort, Margarita, Ben Lambert, Everlyn Kamau, et al.. (2023). Changes in transmission of Enterovirus D68 (EV-D68) in England inferred from seroprevalence data. eLife. 12. 10 indexed citations

10.

Ferguson, Neil M., et al.. (2021). Measuring Vaccine Efficacy Against Infection and Disease in Clinical Trials: Sources and Magnitude of Bias in Coronavirus Disease 2019 (COVID-19) Vaccine Efficacy Estimates. Clinical Infectious Diseases. 75(1). e764–e773. 5 indexed citations

11.

Srinivasan, Manikandan, Kulandaipalayam Natarajan Sindhu, Sidhartha Giri, et al.. (2021). Salmonella Typhi Shedding and Household Transmission by Children With Blood Culture-Confirmed Typhoid Fever in Vellore, South India. The Journal of Infectious Diseases. 224(Supplement_5). S593–S600. 13 indexed citations

12.

Srinivasan, Manikandan, Kulandaipalayam Natarajan Sindhu, Karthikeyan Ramanujam, et al.. (2021). Factors Predicting Blood Culture Positivity in Children With Enteric Fever. The Journal of Infectious Diseases. 224(Supplement_5). S484–S493. 5 indexed citations

13.

Macklin, Grace, Kathleen O’Reilly, Nicholas C. Grassly, et al.. (2020). Evolving epidemiology of poliovirus serotype 2 following withdrawal of the serotype 2 oral poliovirus vaccine. Science. 368(6489). 401–405. 87 indexed citations

14.

Babji, Sudhir, Yin‐Huai Chen, Ira Praharaj, et al.. (2020). Immune predictors of oral poliovirus vaccine immunogenicity among infants in South India. npj Vaccines. 5(1). 27–27. 3 indexed citations

15.

Grassly, Nicholas C., et al.. (2018). Routine immunization in Pakistan: comparison of multiple data sources and identification of factors associated with vaccination. International Health. 10(2). 84–91. 35 indexed citations

16.

Pons-Salort, Margarita, Natalie A. Molodecky, Kathleen O’Reilly, et al.. (2016). Population Immunity against Serotype-2 Poliomyelitis Leading up to the Global Withdrawal of the Oral Poliovirus Vaccine: Spatio-temporal Modelling of Surveillance Data. PLoS Medicine. 13(10). e1002140–e1002140. 18 indexed citations

17.

Jafari, Hamid, Jagadish M. Deshpande, Roland W. Sutter, et al.. (2014). Efficacy of inactivated poliovirus vaccine in India. Science. 345(6199). 922–925. 90 indexed citations

18.

Parker, Edward P K, Beate Kampmann, Gagandeep Kang, & Nicholas C. Grassly. (2014). Influence of Enteric Infections on Response to Oral Poliovirus Vaccine: A Systematic Review and Meta-analysis. The Journal of Infectious Diseases. 210(6). 853–864. 56 indexed citations

19.

Bosch, Jaime, Joan Antoni Oliver, Nicholas C. Grassly, et al.. (2013). Context‐dependent amphibian host population response to an invading pathogen. Ecology. 94(8). 1795–1804. 60 indexed citations

20.

Gambhir, Manoj, et al.. (2007). Trachoma: transmission, infection, and control. The Lancet Infectious Diseases. 7(6). 420–427. 43 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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