Deaths involving COVID-19 by vaccination status, England - Office for National Statistics https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/bulletins/deathsinvolvingcovid19byvaccinationstatusengland/deathsoccurringbetween1april2021and31may2023 “Monthly age-standardised mortality rates (#ASMRs) for deaths involving coronavirus (#COVID19) have been consistently lower for all months since #booster introduction in September 2021 for people who had received a third dose or booster at least 21 days ago, compared with #unvaccinated people and those with just a first or second dose.”