Karen Tiley
MSc PhD
Senior Epidemiologist
Karen joined the Oxford Vaccine Group in September 2020 to work on a maternal-infant measles seroprevalence study.
She was previously based within the Immunisation Department at Public Health England where she completed a PhD by publication in diphtheria epidemiology in 2015.
Research interests include seroepidemiology, vaccine coverage for childhood and maternal vaccination programmes, and studies relating to pneumococcal carriage and disease.
Recent publications
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The waning of maternal measles antibodies: a multi-country maternal-infant seroprevalence study.
Tiley KS. et al, (2025), J Infect
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What is the current evidence base for measles vaccination earlier than 9 months of age?: Report from an informal technical consultation of the World Health Organization.
Varma A. et al, (2025), Vaccine, 57
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Pneumococcal Carriage and Disease in Adults in England, 2011-2019: The Importance of Adults as a Reservoir for Pneumococcus in Communities.
El Safadi D. et al, (2025), J Infect Dis, 231, e17 - e27
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Serum HCoV-spike specific antibodies do not protect against subsequent SARS-CoV-2 infection in children and adolescents.
Ratcliffe H. et al, (2023), iScience, 26
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Nasopharyngeal Carriage of Pneumococcus in Children in England up to 10 Years After 13-Valent Pneumococcal Conjugate Vaccine Introduction: Persistence of Serotypes 3 and 19A and Emergence of 7C.
Tiley KS. et al, (2023), J Infect Dis, 227, 610 - 621