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- Britain's Prime Minister Boris Johnson visits a mass vaccination centre at Ashton Gate stadium in Bristol, southwest England on January 11, 2021. - Seven mass coronavirus vaccination sites opened across England on Monday as the government races to dose millions of people while a new strain of the disease runs rampant across the country. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo by EDDIE MULHOLLAND/POOL/AFP via Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson bumps elbows with First Responder Caroline Cook after she got her vaccination as he visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)
- Britain's Prime Minister Boris Johnson speaks to patients and staff at a mass vaccination centre at Ashton Gate stadium in Bristol England on January 11, 2021. - Seven mass coronavirus vaccination sites opened across England on Monday as the government races to dose millions of people while a new strain of the disease runs rampant across the country. The sites include football stadiums and a horse racing course, and are located in cities including Bristol, London, Newcastle and Manchester. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo by EDDIE MULHOLLAND/POOL/AFP via Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson accompanied by Head Nurse Anne Morris visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson watches First Responder Caroline Cook getting her vaccination as he visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)
- Britain's Prime Minister Boris Johnson visits a mass vaccination centre at Ashton Gate stadium in Bristol, southwest England on January 11, 2021. - Seven mass coronavirus vaccination sites opened across England on Monday as the government races to dose millions of people while a new strain of the disease runs rampant across the country. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo by EDDIE MULHOLLAND/POOL/AFP via Getty Images)
- Britain's Prime Minister Boris Johnson visits a mass vaccination centre at Ashton Gate stadium in Bristol, southwest England on January 11, 2021. - Seven mass coronavirus vaccination sites opened across England on Monday as the government races to dose millions of people while a new strain of the disease runs rampant across the country. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo by EDDIE MULHOLLAND/POOL/AFP via Getty Images)
- Britain's Prime Minister Boris Johnson speaks to patients and staff at a mass vaccination centre at Ashton Gate stadium in Bristol, southwest England on January 11, 2021. - Seven mass coronavirus vaccination sites opened across England on Monday as the government races to dose millions of people while a new strain of the disease runs rampant across the country. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo by EDDIE MULHOLLAND/POOL/AFP via Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson accompanied by Head Nurse Anne Morris visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)
- BRISTOL, ENGLAND - JANUARY 11: Prime Minister Boris Johnson watches First Responder Caroline Cook getting her vaccination as he visits a vaccination centre at Ashton Stadium on January 11, 2021 in Bristol, England. The location is one of several mass vaccination centres in England to open to the public this week. The UK aims to vaccinate 15 million people by mid-February. (Photo by Eddie Mulholland-WPA Pool/Getty Images)