Vaccine invite letter and accompanying leaflets including Sheffield Teaching Hospitals feedback leaflet titled 'Your Experience Matters'; Pfizer Biontech package leaflet last revised June 2021; Public Health England leaflet titled 'COVID-19 vaccination, A guide to phase 2 of the programme', May 2021; Public Health England leaflet titled 'What to expect after your COVID-19 vaccination', March 2021.

In December 2020, the rollout of the COVID-19 vaccine began in the UK. It prioritised those most vulnerable to and at risk of COVID-19, like older adults and health care workers. Gradually, the vaccine was rolled out to other age groups. Containing information like why the vaccine is important and what the potential side effects are, this leaflet and letter were sent to people to invite them to their COVID-19 vaccine. Between December 2020 and November 2022, more than 50 million people in the UK have received both doses of a COVID-19 vaccine and including boosters more than 150 million doses of the different vaccines have been given in total.