Unexposed populations and potential COVID-19 burden in European countries as of 21st November 2021

Funding: This work was funded by the National Insitute for Heatlh Research (NIHR) (NIHR200908) and the Wellcome Trust (206250/Z/17/Z) (LACC, TWR, AJK). The work was partly supported by funding from the European Union's Horizon 2020 research and innovation programme - project EpiPose (101003688: RCB); the FCDO/Wellcome Trust (Epidemic Preparedness Coronavirus research programme 221303/Z/20/Z: KvZ); the Wellcome Trust (210758/Z/18/Z: SA); NIHR (NIHR200929) (NGD); UK MRC (MC_PC_19065) (NGD) and UKRI Research England (NGD). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.