Liham mula kay Propesor Jonathan Van Tam (UK Chief Medical Officer, Department of Health and Social Care) at Antonia Williams (Director, Emergency and Health Protection, DHSC) kay Dr June Raine (CEO, Medicines and Healthcare products Regulatory Agency), tungkol sa bakunang Covid-19 Pfizer–BioNTech (BNT162b2), na may petsang 22/12/2020.