1. Our World in Data. Coronavirus (COVID-19) Vaccinations. https://ourworldindata.org/covid-vaccinations
2. BBC News. Omicron: Three vaccine doses key for protection against variant https://www.bbc.co.uk/news/health-59615005
3. Office for National Statistics. COVID-19 vaccination rates and odds ratios by socio-demographic group https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/healthinequalities/datasets/covid19vaccinationratesandoddsratiosbysociodemographicgroup