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Bio


I am a clinical epidemiologist with a specific focus on infectious diseases and vaccines. I trained in clinical medicine at Oxford University, in infectious diseases in London and Newcastle and in epidemiology at the London School of Hygiene & Tropical Medicine (LSHTM). I joined the Programme in 1993 and I was based at the University of Oxford for 15 years before taking up my current position at LSHTM as Professor of Vaccine Epidemiology.

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Current Work


My work has explored the aetiology of pneumonia in children and adults, the incidence of bacterial invasive diseases in children and the impact of conjugate vaccines against H. influenzae type b and pneumococcus. I have run trials of different types of vaccines against pneumococcus, in different schedules (e.g. for neonates) and different doses and I have established various systems of public health surveillance against invasive bacterial disease and SARS-CoV-2. With Tom Williams I set up the Kilifi Health and Demographic Surveillance System (KHDSS) in 2000 and I have worked with many internal and external collaborators to estimate cause specific morbidity and mortality in the KDHSS. Research Group - Katherine Gallagher - Wangeci Kagucia - Esther Muthumbi - John Ojal Other Roles; Director of the Health Protection Research Unit in Immunisation, London School of Hygiene & Tropical Medicine Policy roles: Member – Joint Committee on Vaccination and Immunisation (JCVI) UK Member – World Health Organization Strategic Advisory Group of Experts on Immunisation (WHO SAGE)

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Recent publications


Global impact of 10- and 13-valent pneumococcal conjugate vaccines on pneumococcal meningitis in all ages: The PSERENADE project.
Yang, Y. Knoll, M. D. Herbert, C. Bennett, J. C. Feikin, D. R. Garcia Quesada, M. Hetrich, M. K. Zeger, S. L. Kagucia, E. W. Xiao, M. Cohen, A. L. van der Linden, M. du Plessis, M. Yildirim, I. Winje, B. A. Varon, E. Valenzuela, M. T. Valentiner-Branth, P. Steens, A. Scott, J. A. Savrasova, L. Sanz, J. C. Khan, A. S. Oishi, K. Nzoyikorera, N. Nuorti, J. P. Mereckiene, J. McMahon, K. McGeer, A. Mackenzie, G. A. MacDonald, L. Ladhani, S. N. Kristinsson, K. G. Kleynhans, J. Kellner, J. D. Jayasinghe, S. Ho, P. L. Hilty, M. Hammitt, L. L. Guevara, M. Gilkison, C. Gierke, R. Desmet, S. De Wals, P. Dagan, R. Colzani, E. Ciruela, P. Chuluunbat, U. Chan, G. Camilli, R. Bruce, M. G. Brandileone, M. C. Ampofo, K. O'Brien, K. L. Hayford, K. Pserenade Team
J Infect, (2025). 90:106426

Serotype distribution of remaining invasive pneumococcal disease after extensive use of ten-valent and 13-valent pneumococcal conjugate vaccines (the PSERENADE project): a global surveillance analysis.
Garcia Quesada, M. Peterson, M. E. Bennett, J. C. Hayford, K. Zeger, S. L. Yang, Y. Hetrich, M. K. Feikin, D. R. Cohen, A. L. von Gottberg, A. van der Linden, M. van Sorge, N. M. de Oliveira, L. H. de Miguel, S. Yildirim, I. Vestrheim, D. F. Verani, J. R. Varon, E. Valentiner-Branth, P. Tzanakaki, G. Sinkovec Zorko, N. Setchanova, L. P. Serhan, F. Scott, K. J. Scott, J. A. Savulescu, C. Savrasova, L. Reyburn, R. Oishi, K. Nuorti, J. P. Napoli, D. Mwenda, J. M. Munoz-Almagro, C. Morfeldt, E. McMahon, K. McGeer, A. Mad'arova, L. Mackenzie, G. A. Eugenia Leon, M. Ladhani, S. N. Kristinsson, K. G. Kozakova, J. Kleynhans, J. Klein, N. P. Kellner, J. D. Jayasinghe, S. Ho, P. L. Hilty, M. Harker-Jones, M. A. Hammitt, L. L. Grgic-Vitek, M. Gilkison, C. Gierke, R. French, N. Diawara, I. Desmet, S. De Wals, P. Dalby, T. Dagan, R. Corcoran, M. Colzani, E. Chanto Chacon, G. Castilla, J. Camilli, R. Ang, M. Ampofo, K. Almeida, S. C. G. Alarcon, P. O'Brien, K. L. Deloria Knoll, M. Pserenade Team
Lancet Infect Dis, (2025). 25:445-456

Global impact of ten-valent and 13-valent pneumococcal conjugate vaccines on invasive pneumococcal disease in all ages (the PSERENADE project): a global surveillance analysis.
Bennett, J. C. Deloria Knoll, M. Kagucia, E. W. Garcia Quesada, M. Zeger, S. L. Hetrich, M. K. Yang, Y. Herbert, C. Ogyu, A. Cohen, A. L. Yildirim, I. Winje, B. A. von Gottberg, A. Viriot, D. van der Linden, M. Valentiner-Branth, P. Suga, S. Steens, A. Skoczynska, A. Sinkovec Zorko, N. Scott, J. A. Savulescu, C. Savrasova, L. Sanz, J. C. Russell, F. Ricketson, L. J. Puentes, R. Nuorti, J. P. Mereckiene, J. McMahon, K. McGeer, A. Mad'arova, L. Mackenzie, G. A. MacDonald, L. Lepp, T. Ladhani, S. N. Kristinsson, K. G. Kozakova, J. Klein, N. P. Jayasinghe, S. Ho, P. L. Hilty, M. Heyderman, R. S. Hasanuzzaman, M. Hammitt, L. L. Guevara, M. Grgic-Vitek, M. Gierke, R. Georgakopoulou, T. Galloway, Y. Diawara, I. Desmet, S. De Wals, P. Dagan, R. Colzani, E. Cohen, C. Ciruela, P. Chuluunbat, U. Chan, G. Camilli, R. Bruce, M. G. Brandileone, M. C. Bigogo, G. Ampofo, K. O'Brien, K. L. Feikin, D. R. Hayford, K. Pserenade Team
Lancet Infect Dis, (2025). 25:457-470

Breastfeeding mothers in DR Congo should have access to the mpox vaccine.
Hombach, J. Lewis, R. Holten, J. V. Scott, J. A. Neuzil, K. M.
Lancet Glob Health, (2024). 12:e1932

UK prevalence of underlying conditions which increase the risk of severe COVID-19 disease: a point prevalence study using electronic health records.
Walker, J. L. Grint, D. J. Strongman, H. Eggo, R. M. Peppa, M. Minassian, C. Mansfield, K. E. Rentsch, C. T. Douglas, I. J. Mathur, R. Wong, A. Y. S. Quint, J. K. Andrews, N. Bernal, J. L. Scott, J. A. Ramsay, M. Smeeth, L. McDonald, H. I.
BMC Public Health, (2021). 21:484

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