My work considers factors that drive variation in uptake and effectiveness of vaccines.

There are two branches to my current research at LSHTM. As co-lead of Theme 1 ('Making the most of real-world data') for the NIHR Health Protection Research Unit in Immunisation, I use electronic health records to understand factors associated with vaccine uptake, effectiveness, and impact in the UK.

I also have a role in the Department of Clinical Research, where my work focuses on the possible contribution of the microbiome to infant oral vaccine response in low- and middle-income countries.

I am interested in data visualisation, and led the development of an interactive mapping tool to help contextualise the COVID-19 outbreak as well as LSHTM's COVID-19 vaccine tracker, which launched in April 2020. In late 2021, I acted as a consultant for the COVID-19 Working Group of the WHO's Strategic Advisory Group of Experts on Immunization.

Popular science writing:

A rise in deaths from preventable diseases must not be part of Covid-19's legacy, The Guardian, April 2020

Coronavirus: who is at risk and how do we know? The Conversation, March 2020 (co-authored with Professor Beate Kampmann)

Coronavirus outbreak: a new mapping tool that lets you scroll through timeline, The Conversation, February 2020

Andy Serkis’s Breathe is a haunting reminder of the pre-vaccine era, The Conversation, October 2017 (reprinted by The Independent)

Salk's swansong: renaissance of the injected polio vaccine, Science-based Medicine, October 2014