1. Medicines and Healthcare Products Regulatory Agency. Vaccine BNT162b2: conditions of authorisation under Regulation 174 2020 [Available from: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/948935/Conditions_of_authorisation_for_Pfizer_BioNTech_311220.pdf.
2. Public Health England. National flu and COVID-19 surveillance report: 21 January 2021 (week 3) 2020 [Available from: https://www.gov.uk/government/statistics/national-flu-and-covid-19-surveillance-reports.
3. Joint Committee on Vaccination and Immunisation. Joint Committee on Vaccination and Immunisation: advice on priority groups for COVID-19 vaccination, 30 December 2020 2020 [Available from: https://www.gov.uk/government/publications/priority-groups-for-coronavirus-covid-19-vaccination-advice-from-the-jcvi-30-december-2020/joint-committee-on-vaccination-and-immunisation-advice-on-priority-groups-for-covid-19-vaccination-30-december-2020#contents.
4. Polack FP , Thomas SJ , Kitchin N , Absalon J , Gurtman A , Lockhart S , et al. Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine. New England Journal of Medicine. 2020.
5. Voysey M , Clemens SAC , Madhi SA , Weckx LY , Folegatti PM , Aley PK , et al. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK. The Lancet. 2020.