Imperial College London


Faculty of MedicineSchool of Public Health

Prof of Infectious Disease & Vaccine Epidemiology



+44 (0)20 7594 3264n.grassly Website




G36Medical SchoolSt Mary's Campus





Nicholas Grassly is a Professor in the Department for Infectious Disease Epidemiology. He is interested in the individual immune response to vaccination and how this translates to impact at the population level. His research group conduct both laboratory and population studies, including clinical trials with collaborators in the UK and India. A strength of his group is the development and use of rigorous statistical methods and mathematical models to analyse study data. His group is the WHO collaborating institute on polio data analysis and modelling.

He studied biology at Oxford University, trained in epidemiology at Imperial College London and learnt mathematics with the Open University. He was a Royal Society URF (2004-2011) and then Professor at Imperial College London (2011-present). He has served on various boards and committees, including the MRC Infections and Immunity Board (2012-16) and the WHO SAGE polio group (2008-present). He teaches on the MSc (Epidemiology), MPH and undergraduate biomedical courses at Imperial College London. His work is funded by the MRC, Wellcome Trust, Royal Society and the Bill and Melinda Gates Foundation.

Current research interests: Infant intestinal microbiome and immune response; Causes of oral vaccine failure (rotavirus and poliovirus); Epidemiology of polio eradication and endgame strategy; Deep sequencing of sewage for poliovirus surveillance; Epidemiology and evolution of enteroviruses; Phylodynamic methods; Typhoid epidemiology in India



Grassly NC, Orenstein WA, 2018, Securing the Eradication of All Polioviruses, Clinical Infectious Diseases, Vol:67, ISSN:1058-4838, Pages:S1-S3

Grassly NC, Wadood MZ, Safdar RM, et al., 2018, Effect of Inactivated Poliovirus Vaccine Campaigns, Pakistan, 2014-2017, Emerging Infectious Diseases, Vol:24, ISSN:1080-6040, Pages:2113-2115

Praharaj I, Parker EPK, Giri S, et al., 2018, Influence of non-polio enteroviruses and the bacterial gut microbiota on oral poliovirus vaccine response: a study from south India., J Infect Dis

Parker EPK, Whitfield H, Baskar C, et al., 2018, FUT2 secretor status is not associated with oral poliovirus vaccine immunogenicity in south Indian infants., J Infect Dis

Blake IM, Pons-Salort M, Molodecky NA, et al., 2018, Type 2 Poliovirus Detection after Global Withdrawal of Trivalent Oral Vaccine, New England Journal of Medicine, Vol:379, ISSN:0028-4793, Pages:834-845

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