Estimation of the relative effectiveness and waning of the monovalent third dose of COVID-19 vaccine against hospital admission in France: a novel self-controlled case series analysis.
We present a novel application of the SCCS method for estimating the effectiveness and waning of the third dose of COVID-19 monovalent vaccine in France. We used data on individuals hospitalised for COVID-19 between September 2021 and February 2022 from the Système National des Données de Santé. Only cases having recei...