Volunteers are illuminated by ultra violet light to demonstrate how bacteria and contamination can be spread as they are trained by St John Ambulance instructors to administer Covid-19 vaccines at Manchester United Football Club on January 30, 2021 in Manchester, England. The St John Ambulance volunteer-based organisation is training more than 30,000 volunteers to join the UK's covid-19 vaccination campaign. Volunteer vaccinators complete 21.5 hours of training over four weeks, a blend of online and in-person learning. St John Ambulance's highly skilled volunteers have been supporting the NHS throughout the COVID-19 pandemic. (Photo by Christopher Furlong/Getty Images)
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